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प्रश्न
State the factors on which the frequency of the alternating e.m.f. depends.
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उत्तर
The frequency of the alternating e.m.f. depends on the frequency of rotation of the coil.
संबंधित प्रश्न
How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of the coil in them?
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The following diagram in Fig.10.42 shows a coil of several turns of copper wire connected to a sensitive centre zero galvanometer G near a magnet NS. The coil is free to move in the direction shown in the diagram.

(i) Describe the observation if the coil is rapidly moved.
(ii) How would the observation be altered if (a) the coil has twice as many turns (b the coil was made to move three times as fast?
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Derive the equation for a transformer.
