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Question

The essential difference between an AC generator and a DC generator is that:


A

AC generator has an electromagnet while a DC generator has permanent magnet.

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B

AC generator has split rings while DC generator has slip rings.

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C

AC generator will generate a higher voltage.

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D

AC generator has slip rings while DC generator has split rings.

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Solution

The correct option is D

AC generator has slip rings while DC generator has split rings.


An AC generator contains a slip ring commutator. Hence, the direction of the induced current changes after each half cycle of the coil rotation. On the other hand, a split-ring type commutator is used in DC generators. This commutator maintains a unidirectional current flow, making the generator a DC generator.


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