The primary winding of a transformer draws a current of at

PHYSICS · Subjective · CBSE · Physics · Alternating Current · Alternating Current

Problem

The primary winding of a transformer draws a current of

4.0\,\text{A}

240\,\text{V}

. The secondary delivers

12.0\,\text{A}

78\,\text{V}

. Calculate the efficiency of the transformer to the nearest whole percent.