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A 220 volt input is supplied to a transf...

A 220 volt input is supplied to a transformer.The output circuit draws a currnt of 2.0 ampere at 440 volts If the efficency of the transformer is 80% the current drawn by the primary windings of the transformer is :

A

3.6 ampere

B

2.8 ampere

C

2.5 ampere

D

5.0 ampere

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