Homework Help: Physic

Posted by Janice on Saturday, June 4, 2011 at 4:12am.

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

Physic - drwls, Saturday, June 4, 2011 at 5:15am
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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