What is the total power in a circuit where the calculations yield 20 watts?

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Multiple Choice

What is the total power in a circuit where the calculations yield 20 watts?

Explanation:
Power is the rate at which electrical energy is used or delivered. In a circuit, the total power is the sum of all individual powers or, for a basic source–load setup, P = VI. If your calculations come out to 20 watts, that is the total amount of power being supplied to and used by the circuit. The other numbers would only be correct if you were calculating the power for a subset of the circuit or using different values (for example, peak vs RMS in AC), but for the total power described, 20 watts is the correct and complete result.

Power is the rate at which electrical energy is used or delivered. In a circuit, the total power is the sum of all individual powers or, for a basic source–load setup, P = VI. If your calculations come out to 20 watts, that is the total amount of power being supplied to and used by the circuit. The other numbers would only be correct if you were calculating the power for a subset of the circuit or using different values (for example, peak vs RMS in AC), but for the total power described, 20 watts is the correct and complete result.

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