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In a transformer, number of turns in the...

In a transformer, number of turns in the primary coil are 140 and that in the secondry coil are 280. If current i primary ciol is 4A, then that in the secondary coil is

A

4A

B

2A

C

6A

D

10A

Text Solution

Verified by Experts

The correct Answer is:
B
`underset(P)(N)`/`underset(S)(N)` = `underset(P)(V)`/`underset(S)(V)` = `underset(S)(i)`/`underset(P)(i)`
`therefore` `underset(S)(i)` = `underset(P)(N)``underset(P)(i)`/`underset(S)(N)` = `4 xx 140 / 180 ` = 2A
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