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An ideal transformer has 100 turns in th...

An ideal transformer has `100` turns in the primary and `250` turns in the secondary. The peak value of the ac is `28 V`. The r.m.s. secondary voltage is nearest to

A

50 V

B

70 V

C

100 V

D

40 V

Text Solution

Verified by Experts

The correct Answer is:
A
`(e_(S))/(e_(P))=(n_(S))/(n_(P))`
`therefore e_(S)=(n_(S)*n_(P))/(n_(P))=(250xx28)/(100)`
`e_(rms)=(e_(S))/(sqrt(2))=2.5xx28xx0.707=50V`
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