A proton, deutron and an α-particle enter a magnetic field perpendicular to field with same velocity. What is the ratio of the radii of circular paths?
A
1 : 2 : 2
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B
2 : 1 : 1
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C
1 : 1 : 2
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D
1 : 2 : 1
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Solution
The correct option is A 1 : 2 : 2 Force on a charged particle due circular motion: F=mv2r
Force on a charged particle due to magnetic field: FB=qvB