Commercial unit of electrical energy is _______.

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Joule

Joule/second

watt

kilowatt-hour

answer is D.

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Detailed Solution

Concept: The commercial use of electricity is kilowatt-hour. This is also written as kWh . This is mostly used for the electric utilities.
The unit of electricity is kilowatt-hour (kWh).
Which is used for billing units of energy that are delivered that are consumed by electric utilities.
Hence, the correct option is 4.

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