MDCAT Physics MCQ #453

The potential difference across a 4 ohm resistor is 8 V. What is the power dissipated in it?

MDCAT Physics MCQ #453

  1. Question 1

    Q1. The potential difference across a 4 ohm resistor is 8 V. What is the power dissipated in it?

    • A) 8 W
    • B) 16 W
    • C) 4 W
    • D) 2 W

    Answer: 16 W

    Explanation: Using the formula P = V^2/R, we get P = 8^2/4 = 16 W. Option A is incorrect because it underestimates the power.