A 1 kW hair dryer is used for half an hour- How much energy is used-A- 1-5 unitB- 0-5 unitC- 1 unitD- 0-05 unit

The correct option is B 0.5 unit 1 unit = 1kWh Energy = power x time = 1kW x 0.5 h = 0.5 units ...

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A 1 kW hair d...

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A 1kW hair dryer is used for half an hour. How much energy is used?

1 unit

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0.05 unit

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1.5 unit

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0.5 unit

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