Moving Charges and Magnetism (Field at Centre)

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PhysicsMoving Charges and Magnetism (Field at Centre)

A current I0 flows through a metallic circular loop of radius r. It enters at A and leaves at the diametrically opposite point C, dividing into two semicircular segments ABC and ADC. The resistance of segment ABC is half that of ADC. The magnitude of the magnetic field at the centre O of the loop is:

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