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ABCD is a square loop made of a uniform ...

`ABCD` is a square loop made of a uniform conducting wire. A current enters the loop at `A` and leaves at `D`. The magnetic field is

A

zero only at the centre of the loop

B

maximum at the centre of the loop

C

zero at all point outside the centre loop

D

zero at all points inside the loop

Text Solution

Verified by Experts

The correct Answer is:
C

Resistance of `(AB+BC+CD)=3` Resistance of `(AD)`
`i_(1)=i/4, i_(2)=(3i)/4`
At `O`. Magnetic field due to `(AB+BC+CD)` is equal and opposite to magnetic field due to `(AD)`
`B_(O)=0`
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Knowledge Check

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