Magnetic field due to currentHard

Question

A circular loop of radius 5cm is connected to a source which is providing current 10A as shown in diagram. The ratio of resistance of part ABC to the ADC is 3:4 then magnetic field at the centre ′O′ is-

Options

A.
B.
C.
D.

Solution

B = [I1 - I2] ⊗
I1 = × 10
I2 = × 10

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