An electric iron is rated at 750 W, 230 V. Calculate the electrical energy consumed by the iron in 16 hours.
12 kWh
43.2×106 J
120 kWh
4.32×106 J
A
120 kWh
B
12 kWh
C
4.32×106 J
D
43.2×106 J
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Solution
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Energy consumed =750×16Wh=12000Wh=12kWh Expressed in joule, 12kWh=12000×3600Ws=43.2×106J
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