Magnetic field at point O will be, 2 R μ 0 I interior, 2 R μ 0 I exterior, 2 R μ 0 I ( 1 − π I ) interior, 2 R μ 0 I ( 1 + π I ) exterior

Magnetic field at the centre of circular loop B = 2 R μ 0 I interior.

Magnetic field at point O will be

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Magnetic field at point $O$ will be

PhysicsMagnetic Effects of CurrentJIPMERJIPMER 2014

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The correct answer is: $\frac{\mu_0 I}{2 R}$ interior

Magnetic field at the centre of circular loop $B=\frac{\mu_0 I}{2 R}$ interior.

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