Question

The force on a conductor of length $l$ placed in a magnetic field of magnitude $B$ and carrying a current $ i $ is given by ( $ \theta $ is the angle, the conductor makes with the direction of $B$):

• A. $ F=i\,lB\sin \theta $
• B. $ F=i^{2}lB^{2}\sin \theta $
• C. $ F=i\,l\,B\,\cos \theta $
• D. $ F=\frac{i^{2}l}{B}\sin \theta $

Answer 1

Answer: (A)

The general equation for the force acting on a current carrying conductor placed in a magnetic field $[B]$ is given by
The expression can also be obtained from Lorentz force equation.