ESCO Electrical Employment Ready Practice Test

A 120 V supply delivers 2 A to a load; what is the power in watts?

120 W 480 W 60 W 240 W

Correct Answer:

240 W

Explanation:

Power in an electrical circuit is found by multiplying voltage by current: P = V × I. With a 120-volt supply delivering 2 amperes, the power is 120 × 2 = 240 watts. This shows how the load converts electrical energy into useful power. For comparison, using the same voltage, a smaller current (like 1 A) would give 120 W, while a larger current (like 4 A) would give 480 W, and 0.5 A would give 60 W.

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