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Why DC transformer is not used?
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Why transformer is not used in half wave rectifier?

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Why is a galvanometer not used to measure AC current?

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Why is a hydrometer not used to measure the state of charge of a nickel-cadmium battery?

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Why transformer works on AC rather than DC?
Answer : A transformer works on **AC (Alternating Current)** rather than DC (Direct Current) because of the way it relies on changing magnetic fields to transfer energy between its coils. Here's how it works: 1 ... *. With **DC**, the magnetic field doesn't change, and the transformer can't transfer power....

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Why back emf used for a dc motor? highlight its significance.

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