Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A proton of mass 
and charge 
is projected with a speed of 
at an angle of 
to the 
-axis. If a uniform magnetic field of 
is applied along 
-axis, the path of proton is
A
a circle of radius 
and time period 
and time period
B
a circle of radius 
and time period 
and time period
C
a helix of radius 
and time period 
and time period
D
a helix of radius 
and time period 
and time period
Text Solution
Verified by ExpertsThe correct answer is:
C
Given, 
,
As velocity of proton is inclined to the direction of magnetic field, so it will move on a circular path while moving in forward direction. So, the path of proton is helical path.
Radius of the circular path,
Time period of revolution,
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