In DC circuits, power is calculated as:

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Multiple Choice

In DC circuits, power is calculated as:

Explanation:
Power in a DC circuit is the rate at which electrical energy is transferred, and it equals the product of voltage and current: P = V × I. The voltage provides the driving potential, and the current is the rate of charge flow, so multiplying them gives how much energy per second is delivered to the load. If you know resistance as well, you can also express power as P = I^2R or P = V^2 / R, both of which come from combining P = VI with Ohm’s law V = IR. For example, a 12-volt source delivering 2 amperes yields 24 watts of power. The other forms don’t represent power in watts: I × R equals voltage, not power; V ÷ I equals resistance, not power; V × R equals volt-ohms, not watts.

Power in a DC circuit is the rate at which electrical energy is transferred, and it equals the product of voltage and current: P = V × I. The voltage provides the driving potential, and the current is the rate of charge flow, so multiplying them gives how much energy per second is delivered to the load. If you know resistance as well, you can also express power as P = I^2R or P = V^2 / R, both of which come from combining P = VI with Ohm’s law V = IR.

For example, a 12-volt source delivering 2 amperes yields 24 watts of power.

The other forms don’t represent power in watts: I × R equals voltage, not power; V ÷ I equals resistance, not power; V × R equals volt-ohms, not watts.

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