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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:
(1.) 3.6A
(2.) 2.8A
(3.) 2.5A
(4.) 5.0A

A

3.6 ampere

B

2.8 ampere

C

2.5 ampere

D

5.0 ampere

Text Solution

Verified by Experts

The correct Answer is:
D
`eta=(V_(S)I_(S))/(V_(p)I_(p))=0.8impliesI_(p)=((440)(20))/((0.8)(200))=5A`
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