Magnetic lines of force never Intersect each other. What Is the reason ?

The electric lines of force never intersect one another - Explain this statement.

When current passes through a conductor kept near a magnetic needle , the magnetic needle deflects . What is the reason for this.

Why cannot two field lines interest each other?

A charged particle is released from rest in a re gion of steady and uniform electric and magnetic fields, which are parallel to each other. What will be the nature of the path followed by the charged particle? Explain your answer.

Friction is the force which opposes the relative motion between two surfaces in contact with each other. What is a limiting static friction?State the laws related to this.

The magnetic lines of force inside a bar magnet....... (a)are from the south pole to the north pole of the magnet (b)are from the north pole to the south pole of the magnet (c)do not exist (d)depend upon the area of crosssection of the bar magnet