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A transformer has 50 turns in the primar...

A transformer has 50 turns in the primary and 100 in the secondary. If the primary is connected to a `220 V DC` supply, what will be the voltage across the secondary?

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Transformer works upon the priciple of induction which is only possible in case of AC.
Hence when DC is supplied to it, the primary coil blocks the current supplied to it. Thus the induced current in the secondary coil is zero.
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