If a load draws 2.5 amperes from a 12-volt supply, what is the wattage?

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Multiple Choice

If a load draws 2.5 amperes from a 12-volt supply, what is the wattage?

Explanation:
Power equals voltage times current, P = V × I. With a 12-volt supply and 2.5 amperes, the power is 12 × 2.5 = 30 watts. So the load uses 30 watts. The other options would require different currents at 12 V: 40 W would need about 3.33 A, 25 W would need about 2.08 A, and 60 W would need about 5 A.

Power equals voltage times current, P = V × I. With a 12-volt supply and 2.5 amperes, the power is 12 × 2.5 = 30 watts. So the load uses 30 watts. The other options would require different currents at 12 V: 40 W would need about 3.33 A, 25 W would need about 2.08 A, and 60 W would need about 5 A.

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