What is the formula for power in a DC circuit?

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Multiple Choice

What is the formula for power in a DC circuit?

Explanation:
Power in a DC circuit is the rate at which electrical energy is transferred. It's determined by how hard the charges are pushed (voltage) and how many charges flow per second (current). Multiply these two quantities to get the power, so the standard formula is P = V × I. Since volts times amperes yields watts, this expression gives power in watts. You can also derive equivalent forms from Ohm's law: with V = IR, P can be written as I²R or V²/R. Multiplying voltage by resistance isn’t a general way to get power, so that option isn’t correct.

Power in a DC circuit is the rate at which electrical energy is transferred. It's determined by how hard the charges are pushed (voltage) and how many charges flow per second (current). Multiply these two quantities to get the power, so the standard formula is P = V × I. Since volts times amperes yields watts, this expression gives power in watts. You can also derive equivalent forms from Ohm's law: with V = IR, P can be written as I²R or V²/R. Multiplying voltage by resistance isn’t a general way to get power, so that option isn’t correct.

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