Question

02. AN ELECTRON BEAM IS MOVING HORIZONTALLY FROM
SOUTH TO NORTH IN THE VERTICAL COMPONENT OF EARTH
MAGNETIC FIELD DIRECTED DOWNWARDS, IN WHICH DIRECTION
IS THE FORCE PRODUCED?​

Answer 1

Applying right-hand rule for the cross product of vectors, we find that the direction of v x B is towards east.

Since,

F=-e(v×B)

therefore, the beam will be deflected towards opposite to east as given by the formula.

So the beam will be deflected towards west.