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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A proton of mass m and charge q is moving in a plane with kinetic energy E. If there exists a uniform magnetic field B, perpendicular to the plane of the motion, the proton will move in a circular path of radius

Answer: (B)

Solution

so ; the other

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Question ID VK-078752