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Work, Energy and Power

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Physics Part I

Physics

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Class 10 Class 12

What is the relation between kWh and Joule?

1kWh = 3.6x10⁶J.

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[M¹L²T^–3] is the dimensional formula of power.

Power =

Work over time space equals space fraction numerator M to the power of 1 L squared T to the power of negative 2 end exponent over denominator T to the power of 1 end fraction space equals space left square bracket space M to the power of 1 L squared T to the power of negative 3 end exponent right square bracket

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What is watt?

SI unit of power is Watt.

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Define watt.

Power is said to be one watt if one joule of work is done in one second.

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How many joules are there in one eV?

1 eV = 1.6x10^–19J.

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