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A small square loop of wire of side l is...

A small square loop of wire of side l is placed inside a large square loop of wire of side L(`L gt gt l`). The loop are coplanar and their centres coincide. The mutual inductance of the system is proportional to

A

I/l

B

`I^(2)//L`

C

`L//I`

D

`L^(2)//I`

Text Solution

Verified by Experts

The correct Answer is:
B
`phi=MI=BA= {4((mu_(0))/(4 pi))(I)/(((L)/(2)))2 sin 45^(@) }l^(2)`
`M prop (l^(2))/(L)`
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