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JEE Main 2012 Physics question

PhysicsMoving Charges and MagnetismJEE Main 2012

Proton, Deuteron and alpha particle of the same kinetic energy are moving in circular trajectories in a constant magnetic field. The radii of proton, deuteron and alpha particle are respectively , and . Which one of the following relations is correct?

Answer: (2)

Solution

. Proton: ; deuteron:

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Question ID VK-103733