An Electric Device, Which Heats Water by Immersing a Resistance

Multiple Choice

An electric device, which heats water by immersing a resistance wire in the water, generates 50 cal of heat per second when an electric potential difference of 12 V is placed across its leads. What is the resistance of the heater wire? (Note: 1 cal = 4.186 J)

A) 0.94 Ω
B) 0.81 Ω
C) 0.58 Ω
D) 0.69 Ω
E) 1.5 Ω