Question

What happens to the force experienced by a current carrying conductor placed in a uniform magnetic field when :

a) Current is decreased

b) Length of the conductor is increased

Answer 1

The magnitude of the force experienced by a current carrying conductor placed in a uniform magnetic field is given by:- 

\(F = BIL sinθ\),

(a) As \(F ∝I\), so, If current is decreased, then the force experienced by the current carrying conductor will also be decreased.  

(b) As \(F ∝L\) so if the length of the conductor is increased, then the force experienced by the current carrying conductor will also be increased. 

Answer 2

F = iBl sin θ

F_max = iBl sin\(\frac{\pi}2\)

F_max = iBl

Then Current i = \(\frac{F}{Bl}\)