why the commutator is not used in ac generator but it is used in dc generator

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Solution

If there is no commutator, the electrical current will switch it's direction after half cycle. That is what we want for AC generator. But for DC generator we don't want to switch the direction, that's why we don't use commutator in DC generator.

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Similar questions

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.

(b) DC generator will generate a higher voltage.

(d) AC generator has slip rings while the DC generator has a commutator.

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