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it is B ! generator changes mechanical energy into electrical energy !

Answer:

b. mechanical energy into electrical energy.

Explanation:

A generator is based on the principle of Faraday's law of induction. A conducting coil is rotated in a magnetic field. This induces emf in the coil and current is generated. Thus, a generator transforms mechanical energy into electrical energy. Work done to rotate the axle is converted to electrical energy. A generator is used in electrical power grids.

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