State PCS PYQPrelims 2025

BPSC – Combined Competitive Examination · Question 128

Which term in the following does NOT represent electric power in an electric circuit?

  1. IR
  2. I²R
  3. VI
  4. V²/R
Show answer & explanation

Answer: (A) IR

Explanation

Power P = VI = I²R = V²/R. IR is just voltage by Ohm's law.

  • (A) Correct

    Correct: IR equals voltage (V), not power.

  • (B) Incorrect

    Wrong: P = I²R is a valid power expression.

  • (C) Incorrect

    Wrong: P = VI is a valid power expression.

  • (D) Incorrect

    Wrong: P = V²/R is a valid power expression.