Question

Why is the output power of a dynamo is always less than the input power?

Answer 1

Explanation:

The power received by a dynamo is called the input; in a generator it is mechanical power, while in a motor it is electrical power. ... The power input to a dynamo is always more than its power output; that is, a generator or motor cannot convert all the power it receives into useful output.

Answer 2

Explanation:

Because in processing some of energy is used by dynamo so output power is always less than the input power.

Note This is applicable to all device that output source is always less then the input source.

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