Question

what happens to the force (magnitude and direction) on the wire when
(i) the size of the current through the wire is increased ?
(ii)
A weaker magnet is used ?
(iii) the size of the current the same but the direction of the current is reversed

Answer 1

Force on a wire = i B x L
where i = current magnitude
B = magnetic field vector
L = wire length and direction vector
x denotes vector cross product

(i) force doubles and direction remains the same

(ii) less force, same direction

(iii) same force, opposite direction