Two wires are bent (shown as joint-circle) with radius r (in xy plane) – InterviewSolution

1.	Two wires are bent (shown as joint-circle) with radius r (in xy plane). The upper half has resistance of 2R Ω and the lower half of R Ω. A current I is passed into circle as shown. The magnetic field at centre is :
Answer» Two wires are bent (shown as joint-circle) with radius r (in xy plane). The upper half has resistance of 2R Ω and the lower half of R Ω. A current I is passed into circle as shown. The magnetic field at centre is :

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