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

Options

A. 100 W
B. 300 W
C. 180 W
D. 60 W

Answer

D

Explanation

Efficiency of a transformer,
`eta=("Power output")/("Power input")`
For an ideal transformer, `eta=1`
`therefore` Power output = Power input = 60 W.