A proton directed to positive x axis in uniform magnetic field along y axis then direction of force.

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Solution

Dear Student,

According to the given we can see that proton is directed towards positive x axis and uniform magnetic field in y axis. hence to find out the force we can apply right hand palm rule.
In this thumb denotes the direction of motion of particle, fingers magnetic field, and the palm denotes the force exerted due to magnetic field.
So in this force exerted will in positive Z axis.
F = q ( v x B)
= (i x j)
= k (direction)

Regards

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