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Question

The arm of an electric generator with split rings is rotated in clockwise direction. The deflection of the galvanometer will _______.

A
be towards right
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B
be towards left
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C
Can not be determined
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D
oscillates between left and right.
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Solution

The correct option is B be towards left
Applying Fleming’s right hand rule on the left arm, we get the direction of current as from A to B. In the right arm, the direction of current will be from C to D. Hence, the galvanometer deflects to the left. Since the coil is connected to the circuit through split rings, it will be a DC generator and hence, the direction of current is constant.

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