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Current flows through uniform square fra...

Current flows through uniform square frames as shown. In which case is the magnetic field at the centre of the frame not zero ?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
In arrangements (a), (b) and (d), the field at the centre due to the currents flowing in the square frames is zero. The field here in option (c) due to the currents flowing in the ouyt of the frame is non zero.
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