If the current is 5 A in a circuit with a resistance of 2 ohms, the power dissipated is ____ watts.

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Prepare for the NCCER Introduction to Electrical Circuits exam. Utilize flashcards and multiple choice questions with hints and explanations to excel on your test.

Multiple Choice

If the current is 5 A in a circuit with a resistance of 2 ohms, the power dissipated is ____ watts.

Explanation:
Power dissipated in a resistor comes from P = I^2R. With a current of 5 A and a resistance of 2 ohms, you get P = (5)^2 × 2 = 25 × 2 = 50 watts. You can double-check by finding the voltage across the resistor: V = IR = 5 × 2 = 10 V, and then P = VI = 5 × 10 = 50 watts. So the power dissipated is 50 watts.

Power dissipated in a resistor comes from P = I^2R. With a current of 5 A and a resistance of 2 ohms, you get P = (5)^2 × 2 = 25 × 2 = 50 watts. You can double-check by finding the voltage across the resistor: V = IR = 5 × 2 = 10 V, and then P = VI = 5 × 10 = 50 watts. So the power dissipated is 50 watts.

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