A 15 Ω resistor carries 4 A. What is the voltage across the resistor?

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Multiple Choice

A 15 Ω resistor carries 4 A. What is the voltage across the resistor?

Explanation:
Ohm’s law links voltage, current, and resistance: V = I × R. With a current of 4 A through a 15 Ω resistor, the voltage across it is V = 4 × 15 = 60 V. This is the potential difference driving the current through that resistor. For extra context, the power dissipated would be P = I²R = 4² × 15 = 240 W, which also follows from these same quantities.

Ohm’s law links voltage, current, and resistance: V = I × R. With a current of 4 A through a 15 Ω resistor, the voltage across it is V = 4 × 15 = 60 V. This is the potential difference driving the current through that resistor. For extra context, the power dissipated would be P = I²R = 4² × 15 = 240 W, which also follows from these same quantities.

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