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Question

A d.c generator is based on the principle of :

(a) electrochemical induction (b) electromagnetic induction

(c) magnetic effect of current (d) heating effect of current

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Solution

(b) electromagnetic induction

Explanation: When a conductor moves in a magnetic field it cuts magnetic lines of force, due to which an emf is induced in the conductor. The magnitude of this induced emf depends upon the rate of change of flux (magnetic line force) linkage with the conductor. This emf will cause a current to flow if the conductor circuit is closed.


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