In the primary coil of transformer current and voltage are 3A and 210 volts. In the secondary coil 735V voltage produces. Then ratio of number of turns in secondary coil and primary coil will be

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7 : 2

10 : 1

1 : 1

9 : 7

answer is A.

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Detailed Solution

nsnp=VsVp=735210=72 .

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