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For a specified input voltage and frequency, if the equivalent radius of the core of a transformer is reduced by half, the factor by which the number of turns in the primary should change to maintain the same no load current is
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1 4
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1 2
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- 4
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Correct Option: C
If the equivalent Radius of the corre of a transformer is reduced by half then teh reluctance of the core becomes double.
4 to maintain same no-load current the primary turns should be double. Then flux remains same.
