Electronic Components

Match each magnetic component type to its primary operational characteristic and circuit application.

Which of the following best describes the primary function of an inductor in an electronic circuit?

A technician needs to wire a single DC power source so that an operator can toggle power between an amber standby indicator and a green run indicator, ensuring only one light is energized at any given time. Which switch type should be selected?

Match each capacitor circuit application with its primary functional role in electronic systems.

A $12\text{ V}$ DC power source is connected in series with a $100\ \Omega$ load resistor and a parallel pair of silicon diodes ($D_1$ and $D_2$). In the parallel branch, the anode of $D_1$ is connected toward the positive supply terminal, while the cathode of $D_2$ is connected toward the positive supply terminal. Assuming each silicon diode has a standard forward voltage drop of $0.7\text{ V}$ and zero reverse leakage current, what is the voltage drop across the $100\ \Omega$ load resistor?

In electronics, inductors and transformers rely on magnetic fields to store energy, filter signals, and modify alternating current voltages. Match each component term to its correct definition or operational characteristic.

An electronics technician is testing a bipolar junction transistor (BJT) configured as an electronic switch. When the base receives sufficient input voltage and current to drive the transistor into full conduction with minimum resistance between the collector and emitter, in which operating region is the transistor functioning?

An electromechanical relay provides electrical isolation between the control circuit powering its coil and the separate circuit switched by its contacts.

In a linear DC power supply circuit, a technician places a smoothing filter capacitor in parallel with the load resistor following a bridge rectifier. What primary function does this capacitor perform in this circuit?

Specialized semiconductor diodes are engineered with distinct physical and electrical properties to perform specific functions in electronic circuits. Match each specialized diode and operating condition on the left with its corresponding functional characteristic or application on the right.

A technician installs an inductor (choke) in series with the output line of a direct current (DC) power supply to filter out residual alternating current (AC) ripple. What is the primary effect of the inductor on this electrical current?

In standard electronic schematic symbols for bipolar junction transistors (BJTs), the arrow is located on the emitter terminal and points outward away from the base for an NPN transistor, indicating the direction of conventional current flow.

In an electromechanical relay, which internal component creates the magnetic field needed to pull the movable armature and actuate the electrical contacts?

An avionics technician is assembling a filtering network using three capacitors connected in series. The capacitors have ratings of $30\text{ }\mu\text{F}$, $20\text{ }\mu\text{F}$, and $60\text{ }\mu\text{F}$. What is the total equivalent capacitance of this series network in microfarads ($\mu\text{F}$)?

A control transformer in an HVAC system steps down an input line voltage of $240\text{ V}$ AC to an output voltage of $24\text{ V}$ AC to safely power a thermostat circuit. If the primary winding consists of $800$ turns of wire, what is the number of turns on the secondary winding?

In an electronic power system, two ideal transformers are cascaded (connected in sequence).

Transformer 1 receives an input voltage of $1{}200\text{ V AC}$ on its primary coil, which has $3{}000\text{ turns}$. The secondary coil of Transformer 1 has $600\text{ turns}$, and its output voltage is fed directly into the primary coil of Transformer 2.

Transformer 2 further steps down this voltage to supply exactly $48\text{ V AC}$ to an electronic load.

If the secondary coil of Transformer 2 contains $50\text{ turns}$, how many turns must the primary coil of Transformer 2 have?

An electronics technician is testing a power supply circuit featuring a four-diode full-wave bridge rectifier driven by a $60\text{ Hz}$ AC secondary winding. During testing under load, one of the four rectifier diodes fails open. Which of the following best describes the electrical output observed across the load resistor?

A technician is configuring a PNP bipolar junction transistor to operate as a switch. To forward-bias the base-emitter junction and turn the transistor ON, what electrical condition must be established at the base terminal relative to the emitter?

An electronics technician is organizing replacement components for various power supply and control circuits. Pair each protective device with its designated operational response or circuit function. What is the correct match for each component?

When a freewheeling (flyback) diode is installed across an inductive DC relay coil to suppress transient voltage spikes, its cathode must be connected to the positive supply rail so that the diode remains reverse-biased during normal energized operation and becomes forward-biased only when the collapsing magnetic field inverts the coil's terminal polarity.