Question

how much power does an electric device use if the current is 36.0 amps and the resistance is 3.9 ohms? a. 140 watts b. 5,100 watts c. 550 watts d. 9.2 watts

Answer 1

P = I²R          

where P = Power in Watts, I = Current in Ampere, R = Resistance in ohms.

P = 36² * 3.9 = 5054.4
 
P ≈ 5100 watts.

Option B.