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A transformer has 140 turns in the prima...

A transformer has 140 turns in the primary and 280 turns in the secondary. If current in primary is 4A, then the current in secondary will be …………

A

4A

B

2A

C

6A

D

10A

Text Solution

Verified by Experts

The correct Answer is:
B
`I_1/I_2=N_2/N_1`
`therefore I_2=I_1xxN_1/N_2=4xx140/280`
`therefore I_2`= 2A
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