Question

A proton of mass kg and charge C is projected with a speed of at an angle of to the axis. If a uniform magnetic field of T is applied along axis, the path of proton is :

A

a circle of radius 0.2 m and time period

B

a circle of radius 0.1 m and time period

C

a helix of radius 0.1 m and time period

D

a helix of radius 0.2 m and time period

Medium
Updated on : 2022-09-05
Solution
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Correct option is C)



Since , this component will be responsible for motion along the direction i.e axis.
The path will be helical and pitch will be constant.
Radius of the circle perpendicular to the magnetic field




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