engineering physics MCQ #953

The power dissipated in a resistor is 20 W when the voltage is 10 V. The resistance is?

engineering physics MCQ #953

  1. Question 1

    Q1. The power dissipated in a resistor is 20 W when the voltage is 10 V. The resistance is?

    • A) 5 ohm
    • B) 10 ohm
    • C) 2 ohm
    • D) 8 ohm

    Answer: 5 ohm

    Explanation: P = V²/R, so R = V²/P = (10 V)² / 20 W = 5 ohm.