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The coils of a step down transformer hav...

The coils of a step down transformer have `500` and `5000` turns. In the primary coil an ac of `4` ampere at `2200` volts is sent. The value of the current and potential difference in the secondary coil will be

A

`20A,220V`

B

`0.4A,22000 v`

C

`40 A,220V`

D

`40A,22000V`

Text Solution

Verified by Experts

The correct Answer is:
C
`(N_(p))/(N_(s))=(V_(p))/(v_(s))=(i_(s))/(i_(p))`. The transformer is step-down type, so primary coil will have more turns. Hence
`(5000)/(500)=(2200)/(V_(s))=(i_(s))/(4)impliesV_(s)=220V,i_(s)=40 amp`
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