If a device uses 2 A at 120 V, what is its power in watts?

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Multiple Choice

If a device uses 2 A at 120 V, what is its power in watts?

Explanation:
Power in electrical circuits comes from multiplying voltage by current. The energy delivered per second (power) equals how much energy per unit charge (voltage) times how many charges move per second (current), so P = V × I. With 120 V and 2 A, the power is 120 × 2 = 240 watts. The other numbers would require different current or voltage: for example, 120 W would be 1 A at 120 V, 480 W would be 4 A at 120 V, and 14 W would be about 0.12 A at 120 V.

Power in electrical circuits comes from multiplying voltage by current. The energy delivered per second (power) equals how much energy per unit charge (voltage) times how many charges move per second (current), so P = V × I. With 120 V and 2 A, the power is 120 × 2 = 240 watts. The other numbers would require different current or voltage: for example, 120 W would be 1 A at 120 V, 480 W would be 4 A at 120 V, and 14 W would be about 0.12 A at 120 V.

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