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A proton is fired from origin with velocity $\to v = v_{0}^j + v_{0}^k$ in a uniform magnetic field $\to B = B_{0}^j$ . In the subsequent motion of the proton
its $y -$ coordinate will be proportional to its time of flight
its $x -$ coordinate can never by positive
its $x -$ and $z -$ coordinate cannot be zero at the same time
None of the above

A

its

y -

coordinate will be proportional to its time of flight

B

its

x -

coordinate can never by positive

C

its

x -

and

z -

coordinate cannot be zero at the same time

D

None of the above

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Solution

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B its $x -$ coordinate can never by positive

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