Electrical Current and Electron Flow

28 soru

Tüm türler28 Çoktan seçmeli15 Doğru / Yanlış7 Eşleştirme6

Match each fundamental principle of electrical current on the left with its correct physical definition or standard unit on the right.

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Cevap

Electric Current pairs with the rate of electric charge flow; Ampere pairs with one coulomb per second; Electron Flow pairs with movement from negative to positive; Conventional Current pairs with flow from positive to negative.

Electric current is the rate at which charge passes a point in a circuit, measured in amperes (

1\text{ A} = 1\text{ C/s}

). In physical conductors, negatively charged electrons flow from the negative source terminal to the positive terminal (electron flow), whereas standard circuit analysis historically assumes flow from positive to negative (conventional current).

Adım Adım Çözüm

Identify the definition of electric current and its unit of measurement

Electric current corresponds to the rate of charge flow through a conductor, and the ampere represents one coulomb of charge passing per second.

Current is mathematically

I = \frac{Q}{t}

, measured in amperes (

1\text{ A} = 1\text{ C/s}

Distinguish between the two directional models of current flow

Electron flow moves from negative to positive (the actual movement of electrons in conductors), whereas conventional current is modeled from positive to negative.

Electrons carry negative charge and are repelled by negative potential, whereas conventional current was standardized before the discovery of the electron.

Anahtar Kavram

Electric current is the time rate of charge flow, measured in amperes (

1\text{ A} = 1\text{ C/s}

), with electron flow occurring from negative to positive and conventional current modeled from positive to negative.

Tahmini Süre:45s

Soru 2Soru →

A direct current (DC) circuit is monitored while a total charge of $180\text{ C}$ passes through a cross-section of a copper conductor over an elapsed time of $2\text{ minutes}$ . What is the magnitude of the resulting current, and in which direction do the free electrons drift through the conductor?

The current is

90\text{ A}

, and electrons drift toward the positive terminal.

The current is

1.5\text{ A}

, and electrons drift toward the negative terminal.

The current is

1.5\text{ A}

, and electrons drift toward the positive terminal.

The current is

1.5\text{ V}

, and electrons drift toward the positive terminal.

Cevabı ve açıklamayı göster

Cevap: The current is $1.5\text{ A}$ , and electrons drift toward the positive terminal.

Cevap

The current is

1.5\text{ A}

, and electrons drift toward the positive terminal.

Current is defined as charge per unit time (

I = \frac{Q}{t}

). Converting

2\text{ minutes}

gives

120\text{ seconds}

, yielding

I = \frac{180\text{ C}}{120\text{ s}} = 1.5\text{ A}

. In metallic conductors, the mobile charge carriers are electrons; because electrons are negatively charged, electrostatic forces drive them away from the negative terminal and toward the positive terminal.

Adım Adım Çözüm

Convert the elapsed time from minutes to the SI base unit of seconds.

t = 2\text{ min} \times 60\text{ s/min} = 120\text{ s}

An ampere is defined as one coulomb per second (

1\text{ A} = 1\text{ C/s}

), which requires time to be expressed in seconds.

Calculate the electric current using the charge rate formula

I = \frac{Q}{t}

I = \frac{180\text{ C}}{120\text{ s}} = 1.5\text{ A}

Current measures the rate at which electric charge flows past a specific point in a circuit.

Determine the physical direction of charge carrier movement in the metallic conductor.

Electrons drift toward the positive terminal.

In solid metal conductors like copper, current consists of free electrons that carry negative charge and are attracted toward the positive potential.

Anahtar Kavram

Electric current is the time rate of charge flow (

I = Q/t

), with physical electron flow moving from negative to positive potential.

Tahmini Süre:45s

Soru 3Soru →

In electrical theory and technician practice, understanding how charge carriers behave, how current is quantified, and how current is measured in a circuit is essential. Match each electrical current concept on the left with its correct fundamental characteristic or definition on the right.

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Cevap

Electron flow direction matches the physical drift of negatively charged particles from negative to positive; Conventional current direction matches the model flowing from positive to negative; One ampere matches the transfer of one coulomb per second (

1\text{ C/s}

); Ammeter circuit placement matches a series configuration inserted directly into the conductive path.

Each concept pairs with its precise physical and operational principle: electron flow tracks actual electron drift (negative to positive), conventional current tracks theoretical positive charge flow (positive to negative), the ampere is defined as coulombs per second, and current measurement requires a series ammeter connection.

Adım Adım Çözüm

Differentiate physical charge motion from conventional flow

Identify that electrons carry negative charge and travel from the negative potential toward positive potential, whereas conventional current models flow from positive to negative.

This establishes the distinction between true physical electron transport and circuit engineering convention.

Apply the SI definition of current intensity

1\text{ Ampere} = 1\text{ Coulomb}/\text{second}

(

I = Q/t

Current is defined strictly as the time rate of charge flow through a conductor cross-section.

Determine proper instrumentation connection for measuring current

An ammeter must be placed in series within the circuit branch.

Because current is the flow of charge through a path, the meter must be part of that continuous path to measure the entire stream of electrons.

Anahtar Kavram

Electrical Current Definition, Carrier Flow Directions, and Measurement

Tahmini Süre:45s

Soru 4Soru →

An ammeter connected in series with a direct-current (DC) circuit registers a steady current of $250\text{ mA}$ . Which of the following statements correctly describes both the rate of electric charge transfer through the conductor and the physical direction of electron flow?

A charge of

0.25\text{ coulombs}

passes through the cross-section each second, with electrons drifting from the positive terminal toward the negative terminal.

The electromotive force drives

4\text{ coulombs}

of energy each second, with electron flow maintaining constant potential throughout the conductor.

A charge of

0.25\text{ coulombs}

passes through the cross-section each second, with electrons drifting from the negative terminal toward the positive terminal.

A charge of

250\text{ coulombs}

alternates direction each second, causing electrons to oscillate back and forth without net directional movement.

Cevabı ve açıklamayı göster

Cevap: A charge of $0.25\text{ coulombs}$ passes through the cross-section each second, with electrons drifting from the negative terminal toward the positive terminal.

Cevap

A charge of

0.25\text{ coulombs}

passes through the cross-section each second, with electrons drifting from the negative terminal toward the positive terminal.

One ampere equals one coulomb of electrical charge passing a point per second (

1\text{ A} = 1\text{ C/s}

). Therefore, a direct current of

250\text{ mA}

(

0.25\text{ A}

) represents an electric charge transfer rate of

0.25\text{ coulombs per second}

. Furthermore, because electrons are negatively charged particles, electrostatic repulsion and attraction cause them to drift from the negative terminal of the DC source, through the external circuit, and into the positive terminal.

Adım Adım Çözüm

Convert the current measurement from milliamperes (

\text{mA}

) to standard SI units of amperes (

\text{A}

250\text{ mA} = 250 \times 10^{-3}\text{ A} = 0.25\text{ A}

The ampere is the standard unit of current where

1\text{ A} = 1000\text{ mA}

Relate the current in amperes to the rate of electric charge flow using the fundamental formula

I = \frac{Q}{t}

0.25\text{ A} = 0.25\text{ coulombs per second}

One ampere is defined strictly as the flow of one coulomb of electrical charge per second.

Determine the physical direction of electron flow in the external circuit.

Electrons flow from the negative terminal to the positive terminal.

Electrons carry a negative charge and are repelled by the negative terminal and attracted toward the positive terminal of the DC power source.

Anahtar Kavram

Electric current is the time rate of charge flow (

1\text{ A} = 1\text{ C/s}

), and physical electron flow travels from negative to positive potential in a DC circuit.

Alternatif Yöntem

Calculate the total time required for a standard unit charge (

1\text{ C}

) to pass:

t = \frac{Q}{I} = \frac{1\text{ C}}{0.25\text{ A}} = 4\text{ seconds}

. This verifies that each second carries

\frac{1}{4}\text{ C} = 0.25\text{ C}

Tahmini Süre:45s

Soru 5Soru →

Match each electrical current term with its correct definition or technical description.

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Cevap

Electron Flow matches the movement of negative charge carriers from negative to positive; Conventional Current matches the flow modeled from positive to negative; Ampere matches the unit defined as one coulomb per second; Ammeter matches the instrument placed in series to measure charge flow rate.

Each electrical term is paired with its precise technical role: electron flow represents real electron drift from negative to positive; conventional current is the established positive-to-negative analysis standard; the ampere represents a charge flow rate of one coulomb per second; and the ammeter is the tool configured in series to monitor that current.

Adım Adım Çözüm

Identify physical charge transport direction versus convention.

Electrons carry negative charge and move from negative to positive (Electron Flow), whereas engineering circuit analysis traditionally assumes positive-to-negative flow (Conventional Current).

Differentiating between physical particle drift and standardized schematic conventions is fundamental to electronics.

Identify the unit of rate of charge flow.

Current (

I

) is measured in amperes (

A

), where

1\text{ A} = 1\text{ C/s}

Current is defined quantitatively as the rate of charge transfer over time (

I = Q/t

Identify the measurement device.

An ammeter measures current and is placed in series so the circuit current passes through it.

Measuring current requires intercepting the stream of charge carriers in a series configuration.

Anahtar Kavram

Fundamental definitions and flow conventions of electrical current

Tahmini Süre:45s

Soru 6Soru →

In a direct-current (DC) circuit powered by a battery, the physical drift velocity of individual free electrons through a solid copper conductor approaches the speed of light, which directly accounts for the nearly instantaneous delivery of electrical energy to a connected load.

Doğru

Yanlış

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False

The statement is false. Individual free electrons in a copper wire drift at an extremely slow pace—typically less than

1\text{ mm/s}

—because of continuous collisions with lattice ions. The virtually instantaneous illumination of a lamp or activation of a load occurs because the electric field travels through the wire at nearly the speed of light, setting all free electrons throughout the circuit into motion almost simultaneously.

Adım Adım Çözüm

Differentiate between charge carrier drift velocity and electromagnetic field propagation in a conductor.

Drift velocity describes the slow, net physical displacement of electrons through the lattice, whereas field propagation is the speed at which the electromotive force and electric field establish across the circuit.

Understanding electrical current requires distinguishing the physical transport of matter and charge from the propagation of the energy-carrying electromagnetic wave.

Analyze the typical magnitude of electron drift velocity (

v_d

) in metallic conductors.

Due to frequent collisions with vibrating copper atoms in the lattice, the net drift velocity of electrons under direct current is on the order of millimeters per second or less (

10^{-4}\text{ m/s}

10^{-3}\text{ m/s}

Thermal motion is fast and random, but the directional drift caused by the applied electric field is very slow.

Identify the mechanism responsible for near-instantaneous energy transfer when closing a circuit switch.

When the circuit closes, an electric field propagates through the conductor at a significant fraction of the speed of light (

c

), simultaneously exerting a force on all free electrons already present in the wire.

Energy is transferred through the field rather than by individual electrons racing from the source to the load.

Evaluate the truth value of the overall technical statement.

Because physical electron drift velocity is microscopic rather than approaching the speed of light, the assertion is false.

The statement erroneously attributes energy delivery speed to physical carrier velocity instead of field propagation.

Anahtar Kavram

Electron drift velocity versus electric field propagation in current flow

Tahmini Süre:45s

Soru 7Soru →

In a direct-current (DC) circuit connected to a battery, what creates electrical current through the metallic conductor?

The accumulation of stationary electric potential without the movement of physical charges

The flow of free electrons moving from the negative terminal toward the positive terminal

The continuous movement of electrons directed from the positive terminal toward the negative terminal

The periodic back-and-forth oscillation of electrons without net forward drift

Cevabı ve açıklamayı göster

Cevap: The flow of free electrons moving from the negative terminal toward the positive terminal

Cevap

The flow of free electrons moving from the negative terminal toward the positive terminal

Electric current in metallic conductors consists of the movement of free electrons. Because electrons carry a negative electrical charge, the electromotive force from a DC source repels them from the negative terminal and attracts them toward the positive terminal, creating a continuous unidirectional drift.

Adım Adım Çözüm

Identify the mobile charge carriers in a metallic conductor.

In metals, loosely bound valence electrons (free electrons) move between atoms.

Atomic nuclei are fixed in the metallic lattice, leaving free electrons as the mobile carriers of electric charge.

Determine the direction of electron drift under a DC voltage source.

Negatively charged electrons are repelled by the negative battery terminal and attracted to the positive terminal.

According to electrostatic principles, like charges repel and opposite charges attract.

Anahtar Kavram

Electric current in a metallic DC circuit is the physical flow of free electrons drifting from the negative terminal toward the positive terminal.

Tahmini Süre:35s

Soru 8Soru →

In a closed direct-current (DC) circuit operating under steady-state conditions, continuous electrical current requires a complete conducting loop through both the external load and the power source. Which of the following correctly describes the direction of physical electron movement throughout the complete circuit?

Electrons flow from the positive terminal to the negative terminal through the external load, and from the negative terminal to the positive terminal inside the power source.

Electrons flow from the negative terminal to the positive terminal through the external load, and are driven from the positive terminal to the negative terminal inside the power source.

Electrons circulate in a single uninterrupted direction from the negative terminal to the positive terminal through both the external conductor and inside the power source.

Electrons and conventional current both travel from the positive terminal to the negative terminal through the external load, driven directly by electromotive force.

Cevabı ve açıklamayı göster

Cevap: Electrons flow from the negative terminal to the positive terminal through the external load, and are driven from the positive terminal to the negative terminal inside the power source.

Cevap

Electrons flow from the negative terminal to the positive terminal through the external load, and are driven from the positive terminal to the negative terminal inside the power source.

In any direct-current circuit, free electrons in the external conductors drift from the negative terminal toward the positive terminal due to electrostatic forces. To sustain continuous current, the power source utilizes electromotive force to pump electrons internally from the positive terminal back to the negative terminal, completing the closed cycle.

Adım Adım Çözüm

Analyze external electron movement

External drift is from the negative terminal to the positive terminal.

Free electrons in metallic conductors carry a negative electric charge and are repelled by the negative battery terminal and attracted toward the positive terminal.

Analyze closed-loop continuity inside the source

Internal drift is from the positive terminal to the negative terminal.

To maintain a continuous current without charge buildup, the source's electromotive force (chemical or mechanical energy) does work against the internal electric field to transport electrons from the positive terminal back to the negative terminal.

Synthesize full loop current dynamics

External flow is negative-to-positive; internal transport is positive-to-negative.

A complete electrical circuit forms a closed loop, ensuring conservation of electric charge across all nodes.

Anahtar Kavram

Closed-Loop Electron Drift and Charge Conservation in DC Circuits

Tahmini Süre:45s

Soru 9Soru →

In electrical circuits, an electric current of one ampere ( $1\text{ A}$ ) is defined as one coulomb of electrical charge passing through a given point in one second.

Doğru

Yanlış

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True

Electric current is the measure of how much electrical charge flows past a specific point per unit of time. Under the International System of Units (SI), a current of one ampere is exactly one coulomb of charge traveling past a reference plane per second.

Adım Adım Çözüm

Identify the standard formula relating electric current, electrical charge, and time.

The formula is

I = \frac{Q}{t}

, where

I

is current,

Q

is charge in coulombs, and

t

is time in seconds.

Current quantifies the rate of electrical charge movement across a conductor cross-section.

Substitute standard SI base units into the rate equation.

1\text{ Ampere} = \frac{1\text{ Coulomb}}{1\text{ Second}}

(

1\text{ A} = 1\text{ C/s}

This establishes that one ampere directly equals one coulomb per second.

Anahtar Kavram

Definition of electric current as the rate of electrical charge flow in coulombs per second (

1\text{ A} = 1\text{ C/s}

Tahmini Süre:30s

Soru 10Soru →

In a direct current (DC) circuit, an ammeter measures the rate of charge flow past a specific point. If exactly $1.248 \times 10^{19}$ electrons flow past this point in $4\text{ seconds}$ , and $1\text{ Coulomb}$ is defined as approximately $6.24 \times 10^{18}$ electrons, which of the following correctly identifies the current magnitude and describes the standard convention for its flow direction relative to the actual electrons?

0.5\text{ A}

; conventional current flows from positive to negative, opposite to the actual electron flow.

0.05\text{ A}

; conventional current flows from positive to negative, opposite to the actual electron flow.

0.5\text{ A}

; conventional current flows from negative to positive, identical to the actual electron flow.

5.0\text{ A}

; conventional current flows from negative to positive, identical to the actual electron flow.

Cevabı ve açıklamayı göster

Cevap: $0.5\text{ A}$ ; conventional current flows from positive to negative, opposite to the actual electron flow.

Cevap

The current is

0.5\text{ A}

, and conventional current is analyzed as flowing from positive to negative, which is opposite to the actual electron flow.

The total charge is found by dividing the number of electrons by the electrons per Coulomb:

1.248 \times 10^{19} / 6.24 \times 10^{18} = 2\text{ Coulombs}

. The current is the charge divided by time:

2\text{ C} / 4\text{ s} = 0.5\text{ A}

. Standard electrical convention dictates that current flows from positive to negative, which is physically opposite to the actual movement of negatively charged electrons.

Adım Adım Çözüm

Convert the given number of electrons into Coulombs of charge.

1.248 \times 10^{19} \text{ electrons} / 6.24 \times 10^{18} \text{ electrons/C} = 2\text{ Coulombs}

Current is defined as the rate of charge flow in Coulombs per second, not electrons per second.

Calculate the current magnitude in Amperes.

I = Q / t = 2\text{ C} / 4\text{ s} = 0.5\text{ A}

One Ampere is equivalent to one Coulomb of charge passing a point in one second.

Determine the relationship between conventional current and actual electron flow.

Conventional current is directed positive to negative, opposite to actual electron flow (negative to positive).

Standard circuit analysis uses conventional current (positive charge flow), while solid conductors actually move negatively charged electrons.

Anahtar Kavram

Electrical Current Calculations and Flow Conventions

Soru 11Soru →

A technician connects a diagnostic meter into a vehicle wire harness to measure the quantity of electric charge passing through a conductor per second. Which electrical property is the technician measuring?

Electromotive force

Electric current

Electrical resistance

Alternating frequency

Cevabı ve açıklamayı göster

Cevap: Electric current

Cevap

Electric current represents the measured rate of electrical charge passing through a conductor per second.

Electric current is defined as the rate at which electrical charge passes a given cross-section of a conductor, mathematically represented by

I = \frac{Q}{t}

, where one ampere equals one coulomb of charge per second.

Adım Adım Çözüm

Analyze the physical measurement described in the question.

The measurement monitors charge (

Q

) moving past a point over elapsed time (

t

Identifying the relationship between electrical charge and time determines the correct physical quantity.

Match the formula

I = \frac{Q}{t}

to its standard electrical property.

The rate of charge flow per second defines electric current, measured in amperes (

1\text{ A} = 1\text{ C/s}

Electric current is the formal definition of moving electric charge carriers through a conductor.

Anahtar Kavram

Electric current is the rate of flow of electric charge over time, expressed as

I = \frac{Q}{t}

and measured in amperes.

Tahmini Süre:35s

Soru 12Soru →

When a direct-current (DC) circuit is energized, which of the following statements correctly describes the physical movement of electrical charge through a solid metallic conductor?

Electrons move from the positive terminal toward the negative terminal.

Electrons move from the negative terminal toward the positive terminal.

Voltage particles move from the negative terminal toward the positive terminal.

Protons move freely through the metallic lattice toward the positive terminal.

Cevabı ve açıklamayı göster

Cevap: Electrons move from the negative terminal toward the positive terminal.

Cevap

Electrons move from the negative terminal toward the positive terminal.

In solid conductors like copper wire, electrical current is physically composed of negatively charged free electrons drifting away from the negative power source terminal and toward the positive terminal.

Adım Adım Çözüm

Identify the charge carriers responsible for current in solid metal conductors.

Free (valence) electrons carry electrical charge in metals, while positive atomic nuclei remain stationary in the lattice.

Establishing the physical particle involved distinguishes electron flow from atomic or ionic movement.

Determine the direction of electrostatic force exerted on negative charges by the power source.

Negatively charged electrons are repelled by the negative terminal and attracted to the positive terminal.

Like charges repel and opposite charges attract, establishing the direction of electron drift.

Anahtar Kavram

Physical current in metallic conductors consists of electron flow traveling from negative potential to positive potential.

Tahmini Süre:30s

Soru 13Soru →

In standard metallic conductors such as copper wire, electric current consists of the directed movement of free valence electrons drifting through the material.

Doğru

Yanlış

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True

The statement is true because the physical flow of electric current in metallic conductors like copper is carried exclusively by free valence electrons drifting through the atomic lattice under an applied electric field.

Adım Adım Çözüm

Identify the charge carriers present in solid metallic conductors.

Metals have an atomic structure characterized by a lattice of fixed positive ions surrounded by loosely held, mobile valence electrons.

Determining which atomic particles are free to move establishes the physical mechanism of conduction.

Evaluate the particle movement that constitutes electrical current.

When a voltage source is applied, these free valence electrons drift collectively through the conductor, which defines the physical flow of electric current.

Atomic nuclei remain locked in the crystal lattice while only the free electrons travel through the wire.

Anahtar Kavram

Physical electric current in solid metallic conductors is the collective drift of free valence electrons.

Tahmini Süre:30s

Soru 14Soru →

When an auxiliary lighting circuit in an electrical system is active, a meter records a current of $1.5\text{ A}$ . What does this electrical current measurement physically represent?

The electromotive force or electrical pressure driving charges through the conductor

The rate at which electric charge flows past a given point in the circuit

The physical opposition that restricts the passage of electrons through the wire

The rapid back-and-forth oscillation of charge carriers between opposite terminals

Cevabı ve açıklamayı göster

Cevap: The rate at which electric charge flows past a given point in the circuit

Cevap

The rate at which electric charge flows past a given point in the circuit

Electric current (

I

) is defined as the rate at which electric charge flows past a cross-sectional point in a conductor. One ampere equals one coulomb of charge passing a point per second (

1\text{ A} = 1\text{ C/s}

Adım Adım Çözüm

Identify the physical definition of electrical current (

I

)

Current represents the quantity of electrical charge (

Q

) passing through a cross-section of a conductor per unit time (

t

), expressed as

I = \frac{Q}{t}

Understanding the base definition of the ampere (

1\text{ A} = 1\text{ Coulomb/second}

) establishes what is being measured.

Distinguish current from related electrical properties like voltage and resistance

Voltage is the driving pressure (EMF), resistance is the opposition to flow, while current is the actual movement rate of the charges.

Eliminates common misconceptions regarding electrical circuit parameters.

Anahtar Kavram

Electric current is the rate of flow of electric charge over time, quantified in amperes.

Tahmini Süre:35s

Soru 15Soru →

While diagnosing a control circuit in an industrial machine, a technician measures the flow of electric current through a closed direct-current (DC) loop. Which statement accurately describes the relationship between the electrical current and charge carriers in this circuit?

Electric current is the electromotive pressure maintained across terminals that exists even when no physical charge is in motion.

Electric current is the continuous rate of charge transfer through the conductor, produced by free electrons drifting toward the positive potential.

Electric current in this DC circuit continuously reverses direction back and forth through the load at a standard cyclic frequency.

Electric current is the movement of bound atomic charges traveling exclusively along the outer protective insulating sheath.

Cevabı ve açıklamayı göster

Cevap: Electric current is the continuous rate of charge transfer through the conductor, produced by free electrons drifting toward the positive potential.

Cevap

Electric current is the continuous rate of charge transfer through the conductor, produced by free electrons drifting toward the positive potential.

Electric current is defined as the rate at which charge passes through a cross-section of a conductor (

I = Q/t

). In standard solid conductors under direct current (DC), the charge carriers are mobile valence electrons that drift unidirectionally toward the positive terminal of the circuit.

Adım Adım Çözüm

Identify the fundamental definition of electric current.

Current (

I

) is defined as the quantity of electrical charge (

Q

) passing a cross-section of a conductor per unit of time (

t

), expressed mathematically as

I = \frac{Q}{t}

Establishing the definition of current separates it from static potential or resistance.

Determine the physical charge carrier behavior in a direct-current metallic circuit.

In metallic conductors, current is carried by negatively charged free valence electrons that drift away from the negative polarity toward the positive terminal in a unidirectional path.

Direct current maintains a constant single direction of charge carrier drift.

Anahtar Kavram

Electric current is the time rate of charge flow through a conductor, with electrons physically moving toward the positive terminal in a DC circuit.

Tahmini Süre:45s

Soru 16Soru →

In an external circuit connected to a direct-current (DC) power source, electron flow theory states that negative charge carriers travel from the positive terminal to the negative terminal.

Doğru

Yanlış

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False

Electron flow theory describes the physical movement of negatively charged electrons, which travel from the negative terminal through the external circuit load toward the positive terminal. Traveling from positive to negative describes conventional current flow.

Adım Adım Çözüm

Identify the electrical current model referenced in the statement.

The statement explicitly cites 'electron flow theory' in an external circuit.

Electronics distinguishes between electron flow theory and conventional current flow theory.

Determine the physical direction of electrons based on fundamental electrostatic laws.

Electrons possess a negative charge, causing them to be repelled by the negative terminal and drawn toward the positive terminal.

Like charges repel each other while opposite charges attract.

Evaluate the accuracy of the statement's claimed direction.

Movement from positive to negative defines conventional current, making the claim regarding electron flow theory false.

Electron flow moves from negative to positive externally.

Anahtar Kavram

Direction of Electron Flow vs. Conventional Current

Tahmini Süre:35s

Soru 17Soru →

An aircraft technician monitors a steady direct-current (DC) sensor loop and determines that $24\text{ coulombs}$ of charge pass through a test conductor in $6\text{ seconds}$ . What is the current in this conductor, and in which direction do the electrons physically drift?

4\text{ A}

, drifting from the positive terminal toward the negative terminal

144\text{ A}

, drifting from the negative terminal toward the positive terminal

4\text{ A}

, drifting from the negative terminal toward the positive terminal

4\text{ A}

, oscillating back and forth continuously without net forward drift

Cevabı ve açıklamayı göster

Cevap: $4\text{ A}$ , drifting from the negative terminal toward the positive terminal

Cevap

4\text{ A}

, drifting from the negative terminal toward the positive terminal

Electric current is the time rate of charge transfer (

I = \frac{Q}{t} = \frac{24\text{ C}}{6\text{ s}} = 4\text{ A}

). In electron flow theory, negatively charged electrons are repelled by the negative terminal and flow through the external circuit toward the positive terminal.

Adım Adım Çözüm

Calculate the magnitude of the electric current using the relationship between charge, current, and time

I = \frac{Q}{t} = \frac{24\text{ C}}{6\text{ s}} = 4\text{ A}

Electric current is defined as the rate at which charge flows past a point in a conductor per unit time.

Determine the physical direction of electron flow in a direct-current circuit

Electrons move from negative potential toward positive potential.

Electrons carry a negative charge and are repelled by the negative terminal and attracted toward the positive terminal.

Anahtar Kavram

Electric current definition (

I = \frac{Q}{t}

) and physical electron drift direction in direct-current circuits

Tahmini Süre:45s

Soru 18Soru →

In basic electronics, distinguishing between charge behavior, measurement units, and current flow conventions is essential. Match each electrical concept on the left with its correct definition or governing rule on the right.

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Cevap

Electron Flow Theory matches the movement of negative charge carriers from negative to positive; Conventional Current Theory matches the historical assumption of flow from positive to negative; Electric Current matches the rate of charge flow over time; One Ampere matches one coulomb of charge per second.

Each electrical term accurately maps to its standard scientific definition: Electron Flow describes negative electrons drifting toward the positive terminal; Conventional Current describes the standard positive-to-negative circuit model; Electric Current represents the rate of charge flow (

I = Q/t

); and One Ampere specifically equals one coulomb passing a given point in one second (

1\text{ C/s}

Adım Adım Çözüm

Identify the physical reality of electron drift versus historical convention.

Electrons are negatively charged, so they drift from negative to positive (Electron Flow). Conventional current historically assumes flow from positive to negative.

Clear differentiation between historical convention and physical subatomic movement is foundational in electrical fundamentals.

Define the quantity of electric current.

Current (

I

) represents the rate of charge (

Q

) flow per unit time (

t

), yielding

I = \frac{Q}{t}

Current measures the flow rate of charge through a conductor, not electrical pressure or potential difference.

Relate the ampere to fundamental SI electrical units.

1\text{ ampere} = 1\text{ coulomb per second}

(

1\text{ A} = 1\text{ C/s}

The ampere quantifies current flow as a unit of coulombs transferred over time in seconds.

Anahtar Kavram

Fundamental definitions of electric current, charge rate, ampere units, and directional flow models.

Alternatif Yöntem

Recall the fundamental dimensional relationships: Current is

I = \frac{\Delta Q}{\Delta t}

, so its unit (

1\text{ A}

) must be equal to

\frac{1\text{ C}}{1\text{ s}}

. Then remember that because electrons possess a negative charge, like charges repel and opposite charges attract, forcing them to move away from the negative terminal toward the positive terminal.

Tahmini Süre:45s

Soru 19Soru →

A technician connects a 12-volt direct-current (DC) power supply to a two-way radio circuit. According to electron flow theory, how do charge carriers physically move through the external wiring?

Electrons move from the positive terminal, through the radio, toward the negative terminal.

Electrons move from the negative terminal, through the radio, toward the positive terminal.

Electrons oscillate back and forth in place without any net directional movement through the circuit.

Electromotive force creates static potential across the wire without causing physical particle drift.

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Cevap: Electrons move from the negative terminal, through the radio, toward the positive terminal.

Cevap

Electrons move from the negative terminal, through the radio, toward the positive terminal.

In solid metallic conductors, electric current is the physical drift of free electrons. Because electrons have a negative charge, they are repelled by the negative terminal of the DC power source and attracted toward the positive terminal through the external circuit.

Adım Adım Çözüm

Identify the nature of the power source and charge carriers

The circuit is powered by a direct-current (DC) source where charge carriers in metallic conductors are negatively charged electrons.

Understanding the carrier polarity is essential for determining movement under an electric field.

Apply electrostatic attraction and repulsion principles

Electrons carry a negative charge and are therefore repelled by the negative battery terminal and attracted toward the positive terminal.

Like charges repel and opposite charges attract.

Determine the physical direction in the external path

In the external circuit outside the power supply, electron flow proceeds from the negative terminal through the load to the positive terminal.

Electron flow theory describes the actual physical movement of electrons.

Anahtar Kavram

Electron flow theory dictates that in a DC circuit, electrons drift through the external conductor from the negative terminal to the positive terminal.

Tahmini Süre:35s

Soru 20Soru →

An electrical circuit that transfers $180\text{ coulombs}$ of charge through a conductor over a span of $3\text{ minutes}$ maintains an electric current of $60\text{ amperes}$ .

Doğru

Yanlış

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Cevap: False

Cevap

False. The actual current is

1\text{ A}

because time must be expressed in seconds (

3\text{ minutes} = 180\text{ seconds}

) when calculating current in amperes (

I = \frac{Q}{t}

The statement is false because the ampere represents charge transfer per second (

1\text{ A} = 1\text{ C/s}

). A charge of

180\text{ coulombs}

flowing over

3\text{ minutes}

(

180\text{ seconds}

) yields an electric current of exactly

1\text{ ampere}

, not

60\text{ amperes}

Adım Adım Çözüm

Convert the elapsed time from minutes to seconds

3\text{ minutes} \times 60\text{ seconds/minute} = 180\text{ seconds}

The base unit of electric current (ampere) is defined as coulombs per second (

1\text{ A} = 1\text{ C/s}

Calculate the electric current using the charge rate formula

I = \frac{Q}{t}

I = \frac{180\text{ C}}{180\text{ s}} = 1\text{ A}

Electric current is the rate of charge flow through a cross-section of a conductor.

Compare the calculated value with the statement's value

The calculated current is

1\text{ A}

, whereas the statement asserts

60\text{ A}

The statement erroneously divides charge by time in minutes rather than seconds.

Anahtar Kavram

Electric current is defined as the rate of charge flow per unit time, where one ampere equals one coulomb per second (

I = \frac{Q}{t}

Tahmini Süre:45s

Sayfa 1 / 2Sonraki

Electrical Current and Electron Flow

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