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Questions  

A proton of energy E moving in a normal magnetic field in a circular path of radius R. The energy of  an αparticle moving in the same magnetic field with same radius is

a
E
b
E/2
c
2 E
d
E/4

detailed solution

Correct option is A

ω=QBm, E=12m(ωR)2=Q2B2R22m∴ EαEP=(QαQP)2.(mPmα)=(2)r.(14)=1⇒ Eα=EP=E

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