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Watt Hour Meter

When a 0.5 kW...

Question

When a 0.5 kW heater operates for 20 minutes, what is the electrical energy consumed (in kJ)?

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Solution

Step 1:- 0.5 kW = 0.5 x 1000 watts

Step 2:-Energy consumed in 1 sec = 500 J

Energy consumed in 20 minutes = 500 x 20 x 60J

= 600000 J

= 600 kJ

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