Could u answer within 2 days ma'am? My exams are starting from Monday?

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1/ The magnetic field is in +Z direction. The magnetic force is given by, F = q(vxB).

Since the force is in +Y direction, and we are using the right hand rule to find the direction, we point in the direction of v i.e. +X. Now we must curl the fingers so the the thumb will point in negative Y direction, since we are dealing with electrons, the direction of force will be opposite to it.

Regards,

Team,

TopperLearning.