Which will spend more electrical energy?
500 W T.V. Set in 30 mins, or 650 W heater in
20 mins?
Answers
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2
Answer:
TV
Explanation:
Power rating of television = 500 W
Time = 30 mins = 0.5 hrs
The energy = 0.5 x 500 Wh = 250 Wh = 0.25 kWh
Power rating of heater = 650 W
Time = 20 s = 1/3 hrs
The energy = 650/3 Wh = 0.65/3 Wh = 0.21kWh
Thus the television will spend more electrical energy
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