A proton is projected into a magnetic field that is directed along the positive

Question

A proton is projected into a magnetic field that is directed along the positive x-axis. Find the direction of the magnetic force exerted on the proton for each of the following directions of the proton's velocity.

(a) the positive y-direction
---Select One--- +x-direction -x-direction +y-direction -y-direction +z-direction -z-direction zero force

(b) the negative y-direction
---Select One--- +x-direction -x-direction +y-direction -y-direction +z-direction -z-direction zero force

(c) the positive x-direction
---Select One--- +x-direction -x-direction +y-direction -y-direction +z-direction -z-direction zero force

Explanation / Answer

a)

-Z direction

From Right hand rule ,When Proton moves in +Y-direction then the direction of magnetic force is in -Z direction

b)

+Z direction

From Right hand rule ,When Proton moves in -Y-direction then the direction of magnetic force is in +Z direction

c)

Zero Force

From Right hand rule ,When Proton moves in +X-direction i.e parallel to the magnetic field ,the magnitude of magnetic force it experiences is zero.

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