engineering physics MCQ #1002

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

engineering physics MCQ #1002

  1. Question 1

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

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

    Answer: 5 ohm

    Explanation: P = V²/R, so 20 = 10²/R, hence R = 5 ohm.