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

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  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

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