The energy consumed by an electric bulb of 100 W in 5 hours is:
A
0.5 kWh
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B
1.5 kWh
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C
2.5 kWh
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D
5 kWh
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Solution
The correct option is A 0.5 kWh Given, power of the electric bulb,Power=100W=1001000kW=0.1kWTimeforwhichbulbisused,t=5hThus,electricalenergyconsumed=0.1kW×5h=0.5kWh