A proton of mass m and charge +e is moving in a circular orbit in a ma – McqOptions

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1.	A proton of mass m and charge +e is moving in a circular orbit in a magnetic field with energy 1 MeV. What should be the energy of \[\alpha -\]particle (mass = 4m and charge = + 2e), so that it can revolve in the path of same radius [BHU 1997]
A.	1 MeV
B.	4 MeV
C.	2 MeV
D.	0.5 MeV
Answer» B. 4 MeV

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