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26/07/2021 11:59 am
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Which uses more energy a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes?
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26/07/2021 12:06 pm
Case 1: TV set
P = 250 W = 0.25 kWh
t = 1h
Energy consumed = P x t
= 0.25 x 1
= 0.25kWh
Case 1: Toaster
P = 1200 W = 1.2 kWh
t = 10 min = 10/60 = 1/6 h
Energy consumed = P x t
= 1.2 x 1/6 = 0.2kWh
Thus, TV uses more energy.