Which one of the following is a correct formula equation? A. P = E2/R B. P = IR C. P = I2E D. P = E2I

Answer;

A. P = E2/R

Explanation;

Based on the context of electricity the formula for power is given by

P = E2/R; where

P is power in Watts;

I is current in Amps;

R is resistance in Ohms; and

E is voltage in Volts.

The formula may also be given as P = V2/R

The correct answer is A.

Explanation:

P = E²/R shows that the power in a circuit is the square of applied voltage applied and inversely with the circuit resistance. This expression is extension of OHM'S law.