Answer :

C

It converts mechanical energy into electrical energy



It consists of armature coil ABCD which is placed between two poles of a horse-shoe shaped electromagnet, two split rings S1 and S2 connected to two brushes B1 and B2 respectively.


When the coil is rotated the magnetic lines changes thus induces a current in the coil. The direction of induced current in the arms of coil reverses after every half rotation which can be obtained by Fleming’s right-hand rule. Here one brush is always in contact with the arm moving up in the field and another brush is in contact with the arm moving downward. So, a unidirectional current flows in the circuit.


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