Calculate The Current Drawn By The Primary Of A Transformer Which Steps Down 200 V To 20 V To Operate A Device Of resistance . Assume The Efficiency Of Transformer To Be 80%.  

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Calculate the current drawn by the primary of a transformer which steps down 200 V to 20 V to operate a device of resistance . Assume the efficiency of transformer to be 80%.  


Correct option is

0.125 A


The efficiency of the transformer is 







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