Question

what happens to the force action on current carrying conductor placed in magnetic field when (a) direction of magnetic field is reversed without changing the direction of current. (b) direction of both current and magnetic field is reversed.

Answer 1

Dear Student

When (a) direction of magnetic field is reversed without changing the direction of current then by Fleming left hand rule, direction of force gets reversed.
(b) When direction of both current and magnetic field is reversed the direction of force remains same.

Regards