Question

Which of the following terms does not represent electrical power in a circuit?

• A. I²R
• B. IR²
• C. VI
• D. \(\frac {V^2}{R}\)

Answer 1

The Correct Option is B

Electric power is defined as \(P = VI\) … (i). Option (C) is correct.

Ohm's law states \(V = IR\) … (ii). Substituting \(V\) from (ii) into (i) yields Power \(P = (IR) × I = I^2R\). Option (A) is correct.

Substituting \(I\) from (ii) into (i) yields Power \(P = V(\frac VR) =\frac { V^2}{R}\). Option (D) is correct.

Therefore, option (B) does not represent electrical power in a circuit.