A device on a 110 V supply draws 5 A. What is its power?
Answer and explanation
Correct answer: C. 550 W
- Step 1: Power P = VI. Step 2. P = 110 × 5 = 550 W. Answer: 550 W. Why not the others: 22 W is what you get if you divide V by I. 115 W is what you get if you add the numbers. 2750 W is what you get if you square the current.
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