A heating element rated at 5 A is connected to 24 V. What is its power?

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Enhance your understanding of the fundamentals of electricity with the AMT General Exam. Study with multiple-choice questions crafted to improve your knowledge and confidence. Prepare effectively for your success!

Multiple Choice

A heating element rated at 5 A is connected to 24 V. What is its power?

Explanation:
Power in an electrical circuit is found by multiplying voltage by current: P = V × I. With 24 V and 5 A, the power is P = 24 × 5 = 120 W. This also checks out if you use the resistance: R = V/I = 24/5 = 4.8 Ω, then P = I^2R = 5^2 × 4.8 = 120 W, or P = V^2/R = 24^2 / 4.8 = 120 W. So the heating element dissipates 120 watts.

Power in an electrical circuit is found by multiplying voltage by current: P = V × I. With 24 V and 5 A, the power is P = 24 × 5 = 120 W. This also checks out if you use the resistance: R = V/I = 24/5 = 4.8 Ω, then P = I^2R = 5^2 × 4.8 = 120 W, or P = V^2/R = 24^2 / 4.8 = 120 W. So the heating element dissipates 120 watts.

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