Which arrangement requires the most electrical power during operation?

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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

Which arrangement requires the most electrical power during operation?

Explanation:
Power is determined by P = V × I, so the setup that combines higher voltage with a larger total current will demand the most power. - Four 30-watt lamps at 12 V in parallel use a total of 120 W (each lamp = 30 W, so 4 × 30 = 120 W). The current per lamp is 30/12 = 2.5 A, totaling 10 A, and 12 V × 10 A also equals 120 W. - A 12 V motor at 8 A uses 96 W (12 × 8 = 96). - Two lights at 24 V drawing 3 A each total 6 A, so power is 24 × 6 = 144 W (each lamp is 24 × 3 = 72 W, two lamps sum to 144 W). - A 24 V motor at 4 A uses 96 W (24 × 4 = 96). The largest power is the two 24 V lights drawing 3 A each, totaling 144 W, so that arrangement requires the most electrical power.

Power is determined by P = V × I, so the setup that combines higher voltage with a larger total current will demand the most power.

  • Four 30-watt lamps at 12 V in parallel use a total of 120 W (each lamp = 30 W, so 4 × 30 = 120 W). The current per lamp is 30/12 = 2.5 A, totaling 10 A, and 12 V × 10 A also equals 120 W.

  • A 12 V motor at 8 A uses 96 W (12 × 8 = 96).

  • Two lights at 24 V drawing 3 A each total 6 A, so power is 24 × 6 = 144 W (each lamp is 24 × 3 = 72 W, two lamps sum to 144 W).

  • A 24 V motor at 4 A uses 96 W (24 × 4 = 96).

The largest power is the two 24 V lights drawing 3 A each, totaling 144 W, so that arrangement requires the most electrical power.

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