Multiple choice Which of the following formulas is used for power in terms of I and R? P = IR P = I2/R P = I2R P = I/R P = R/I2 Reveal answer Fill a bubble to check yourself C Correct answer Explanation We have, P = v x I Now from ohm’s law, we have V/I = R Or v = I X R , now from 1 P = I2R where I = current and R = resistance