A current of 4.00 A flows through the heating element of heater converting 500 J of electrical energy into thermal energy every second. What is the voltage across the ends of the heating element?

Question

a. 2000 V
b. 125 V
c. 250 V
d. 0.008 V
e. 0.125 V

Answer 1

Power = 500J/s = 500 Watts.

V*I = 500
V = 500/I = 500/4 = 125 Volts.