The number of turns in primary and secondary windings of a transformer are 1000 and 100 respectively. If 220 V DC voltage is impressed across the primary terminals, the voltage across secondary terminals is

22 V

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2200 V

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220 V

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0 V

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Solution

The correct option is D 0 V
When we apply DC current through primary terminal of a transformer, there will be no time varying magnetic field produced as the current flowing through the primary coil does not change. Thus, transformer does not work in DC current, hence the voltage across the secondary terminals will be zero volt.

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