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Question

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
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B
1 : 4
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C
2 : 1
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D
1 : 2
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Solution

The correct option is C 2 : 1
r=mvqB rαrp=mαmp×qpqα=41×12=21

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