Question

To make the coil keep rotating, the current is reversed after every half turn by a device called

a) brush

b) commutator

c) mutator

d)carbon spring​

Answer 1

Answer:

The direction of the current must be reversed every half turn, otherwise the coil comes to a halt again. This is achieved using a conducting ring split in two, called a split ring or commutator. A coil of wire is used with lots of turns to increase the effect of the magnetic field.

Answer 2

Answer:

b) Commutator

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