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A transformer having efficiency of 90% i...

A transformer having efficiency of `90%` is working on 200V and 3KW power supply if the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are

A

300V,15A

B

450V,15A

C

450V,13.5A

D

600V,15A

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The correct Answer is:
B
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