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Q.

The ratio of secondary to primary turns is  9 : 4 If power input is P, what will be the ratio of power output (neglect all losses) to power input

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a

4 : 9

b

9 : 4

c

5 : 4

d

1 : 1

answer is D.

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Detailed Solution

Since all the losses are neglected.So  Pout=Pin
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