इस planet का magnetic field बहुत कमजोर है | facts about space | information about solar system

In a conductor, there are free electrons which continuously move randomly but inside the volume of the conductor. When such a conductor is placed inside a magnetic field then what can you say about the magnetic forces acting on the system?

Electric field lines provide information about

Which one of the following is correct information about G.E.R.L. system

A circular loop is kept perpendicular to a uniform magnetic field. Loop is rotated about its diameter with constant angular velocity.

A system consists of two parallel planes carrying currents producing a unifrom magnetic field of induction B between the planes. Outside this space there is no magnetic field. Find the magnetic force acting this space there is no magentic field. Find the magnetic force acting per unit area of each plane.