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Questions  

An α particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities. Find the ratio of the radii of their circular path.

a
4 : 1
b
1 : 4
c
2 : 1
d
1 : 2

detailed solution

Correct option is C

r=mvqB  ⇒  rαrp = mαmp ×  qpqα  =  41 ×  12 = 21

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