Question

A proton is fired from origin with velocity in a uniform magnetic field . In the subsequent motion of the proton

This question has multiple correct options
A

its coordinate will be proportional to its time of flight

B

its coordinate can never by positive

C

its and coordinate cannot be zero at the same time

D

None of the above

Medium
Solution
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Correct options are A) and B)


The force will be always along -ve x-axis.
, the particle will never have cordinate positive since it starts from the origin.
The velocity component along axis will make the path helical.
co-ordinate will be i.e

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