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A 220 V input is supplied to a transform...

A `220 V` input is supplied to a transformer. The output circuit draws a current of `2.0 A` at `440 V`. If the efficiency of the transformer is `80%`, the current drawn by the primery winding of the transformer is

A

5.0 ampere

B

3.6 ampere

C

2.8 ampere

D

2.5 ampere

Text Solution

Verified by Experts

The correct Answer is:
A
`V_(P)=220V,I_(S)=2A,V_(S)=440V`
`eta=(V_(S)I_(S))/(V_(P)I_(P))rArr0.8=(440xx2)/(220xxI_(P))rArrI_(P)=5A`
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