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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

An electron moves in a circular orbit with uniform speed . It produces a magnetic field at the centre of the circle. The radius of the circle is ( = permeability of free space, = electronic charge) [MHTCET 2020]

Answer: (A)

Solution

The orbiting electron is a current , so \frac{μ_0 i}{2r}\frac{μ_0ev}{4π r^2}$⇒

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Question ID VK-078841