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The magnetic field in the cylindrical re...

The magnetic field in the cylindrical region shown in figure increase at a constant rate of `20mT//sec`. Each side of the square loop `ABCD` has a length of `1 cm` and resistance of `4Omega`. Find the current in the wire `AB` if the switch `S` is closed

A

`1.25xx10^(-7)A`,(anticlockwise)

B

`1.25xx10^(-7)A` (clockwise)

C

`2.5xx10^(-7)A`(anticlockwise)

D

`2.5xx10^(-7)A`(clockwise)

Text Solution

Verified by Experts

The correct Answer is:
A
`i=(e)/(R )=(A)/(R ).(db)/(dt)=((1xx10^(-2))^(2))/(16)xx20xx10^(-3)`
`=1.25xx10^(-7)A` (Anti-clockwise).
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