Question

No force acts on a current carrying conductor when it is __________ to the magnetic field.

Answer 1

1. The force acting on a current-carrying conductor is given by, $F=BIL\sin \theta$
2. If the conductor is kept parallel to the magnetic field $\theta =0,F=0$
3. Thus, no force acts on the conductor when it is kept parallel to the magnetic field.

Hence, no force acts on a current-carrying conductor when it is parallel to the magnetic field.