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

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Multiple Choice

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

Current in a circuit is found using I = V / R. With 120 volts across a 10 ohm heater coil, the current is 120 ÷ 10 = 12 amperes. So the coil draws 12 A. The other numbers would require different resistances (for example, 1,200 A would need about 0.1 Ω, 1.2 A would need about 100 Ω, and 0.083 A would need around 1,400 Ω). If you want a bit more context, the power dissipated would be P = V × I = 120 × 12 = 1,440 W.

Current in a circuit is found using I = V / R. With 120 volts across a 10 ohm heater coil, the current is 120 ÷ 10 = 12 amperes. So the coil draws 12 A. The other numbers would require different resistances (for example, 1,200 A would need about 0.1 Ω, 1.2 A would need about 100 Ω, and 0.083 A would need around 1,400 Ω). If you want a bit more context, the power dissipated would be P = V × I = 120 × 12 = 1,440 W.

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