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Zorluk: OrtaOhm's Law

An aircraft instrument panel illumination circuit is connected to a 28 V28\text{ V} direct-current (DC) power source. A multimeter measures a steady current flow of 350 mA350\text{ mA} through the circuit. What is the total electrical resistance of the circuit in ohms (Ω\Omega)?

Cevap: 80 $\Omega$

Cevap

The total electrical resistance of the circuit is 80 Ω80\ \Omega.
According to Ohm's Law, resistance equals voltage divided by current (R=VIR = \frac{V}{I}). Converting 350 mA350\text{ mA} to amperes yields 0.35 A0.35\text{ A}. Dividing 28 V28\text{ V} by 0.35 A0.35\text{ A} gives the correct resistance of 80 Ω80\ \Omega.

Adım Adım Çözüm

1
Convert the current from milliamperes to amperes
I=350 mA=0.35 AI = 350\text{ mA} = 0.35\text{ A}
Ohm's Law calculations require current to be expressed in standard amperes.
2
Apply Ohm's Law formula solved for resistance
R=VI=28 V0.35 A=80 ΩR = \frac{V}{I} = \frac{28\text{ V}}{0.35\text{ A}} = 80\ \Omega
Dividing the applied electromotive force by the current flow yields total circuit resistance.

Anahtar Kavram

Calculating resistance using Ohm's Law (R=VIR = \frac{V}{I}) with metric prefix conversion (1 A=1000 mA1\text{ A} = 1{}000\text{ mA}).
Tahmini Süre:45s
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Konular

Ohm's Law

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