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MHT CET 2023 Physics question

PhysicsMoving Charges and MagnetismMHT CET 2023

An electron (mass m) is accelerated through a potential difference of V and then it enters in a magnetic field of induction 'B' normal to the lines. The radius of the circular path is (e = electronic charge)

Answer: (B)

Solution

Accelerating through potential difference gives kinetic energy , so . In the magnetic field, the magnetic force provides the centripetal force: , so \dfrac{mv}{eB}$ =

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Question ID VK-094668