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The figure shows three indentical curren...

The figure shows three indentical current carryng square loops `A, B` and `C`. Identify the correct statement related to magnetic field B at the centre `O` of the square loop. Current in each wire is I.

A

B is zero in all cases

B

B is zero only incase f C

C

B is non zero in all cases

D

B is non zero only in case of B

Text Solution

Verified by Experts

The correct Answer is:
B
In c two, wires are producing `(o.)` magnitude field and two wires are producing `(ox)` magnetic field.
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