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) Group of answer choices 0.94 Ω 0.58 Ω 1.5 Ω 0.81 Ω 0.69 Ω