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  4. In an ideal transformer the number of turns of primary and secondary coil is given as 100 and 300 respectively. If the power input is 60 W, the power output is

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Q. In an ideal transformer the number of turns of primary and secondary coil is given as 100 and 300 respectively. If the power input is 60 W, the power output is

JIPMERJIPMER 2012Alternating Current

Solution:

Efficiency of a transformer,
$\eta = \frac{\text{Power output}}{\text{Power input}}$
For an ideal transformer, $\eta$ = 1
$\therefore $ Power output = Power input = 60 W