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

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Get ready for the NCCER Introduction to Electrical Circuits exam. Study with multiple choice questions, each question comes with hints and explanations. Ace your exam with confidence!

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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