A heater coil has resistance 10 ohms and is supplied with 120 V. What is the current?

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Multiple Choice

A heater coil has resistance 10 ohms and is supplied with 120 V. What is the current?

Ohm's law connects voltage, current, and resistance: current equals voltage divided by resistance. With 120 V across a 10 Ω heater coil, the current is 120 / 10 = 12 A. This also aligns with the expected power: P = V × I = 120 × 12 = 1,440 W. The other numbers would come from a different resistance or a misapplication of the formula, but given the 120 V and 10 Ω, 12 A is the correct result.

Ohm's law connects voltage, current, and resistance: current equals voltage divided by resistance. With 120 V across a 10 Ω heater coil, the current is 120 / 10 = 12 A. This also aligns with the expected power: P = V × I = 120 × 12 = 1,440 W. The other numbers would come from a different resistance or a misapplication of the formula, but given the 120 V and 10 Ω, 12 A is the correct result.

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