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An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the centre has magnitude

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detailed solution

Correct option is B

Current in the orbit, I=eTI=e(2π/ω)=ωe2π=(2πn)e2π=neMagnetic field at centre of current carrying circular coil is given byB=μ0I2r=μ0ne2r

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