Moving Charges and Magnetism: RE-NEET 2026

Medium· Magnetic Field at Centre of a Circular Current Carrying Arc· +4 / −1

A current

I_0

flows through a metallic circular loop of radius

r

as shown in the figure. Resistance of the segment

ABC

is half that of

ADC

. Magnitude of magnetic field at the centre

O

of the loop is : Figure: a circular loop with

A

at the top and

C

at the bottom (diametrically opposite);

B

is on the left arc and

D

on the right arc. Current

I_0

enters at

A

and leaves at

C

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