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in Physics by (69.4k points)

A transformer is used for a 100 watt, 20 volt electric bulb at a place where the A.C. mains potential is 200 volt and the current drawn is 0.6 A. The efficiency of the transformer is nearly

(a) 48 %

(b) 68 %

(c) 30 %

(d) 83 % 

1 Answer

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Best answer

Correct option  (d) 83 % 

Explanation:

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