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

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

DC generator will generate a higher voltage.

AC generator will generate a higher voltage.

AC generator has slip rings while the DC generator has a commutator.

answer is D.

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Detailed Solution

Option D

Slip rings are used in AC generators. A slip ring is an electromechanical device that permits power and electrical signals to be transmitted from a stationary structure to a revolving structure. A commutator is used in a DC generator. The act of converting generated alternating current in the armature winding of a DC machine into direct current after passing through the commutator and fixed brushes is known as commutation in DC machines or more particularly commutation in DC generators.

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