Moving Charges and Magnetism

Question: An electron is moving with a speed of ${10^8}\,m/\sec $ perpendicular to a uniform magnetic field of intensity B. Suddenly intensity of the magnetic field is reduced to B/2. The radius of the path becomes from the original value of r



1) No change
2) Reduces to r / 2
3) Increases to 2r
4) Stops moving
Solution: Explanation: No Explanation
Motion of Charged Particle In Magnetic Field

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