A proton and an α - particle (Helium nucleus) enters a uniform magnetic field with their direction of velocity perpendicular to the direction of magnetic field.
(i) The path of proton and α - particle will be
[1 Mark]
A
ellipse
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B
helix
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C
straight line
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D
circle
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Solution
The correct option is D circle When V and B are perpendicular then path will be circle. The magnetic force provides required centripetal force.