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A proton is fired from origin with veloc...

A proton is fired from origin with velocity `V=v_(0)hatJ+v_(0)hatK` in a uniform magnetic field B=B_(0)hatJ, in the susbsequent motion of the proton

A

its z-coordinate can never be negative

B

its x-coordinate can never be negative

C

its x-and z-coordinates cannot be zero at the same time

D

its y-coordinate will be proportional to its time of flight

Text Solution

Verified by Experts

The correct Answer is:
(b,d)
The path of the particle will be helix as shown in fig. Clearly
x-coordinate is always negative. z-coordinate can be negative
and positive both. X and z coordinate will be zero at the same
time at points A, C etc
`y=v_0t implies ypropt`
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