Question

Choose the correct alternative, in relation to properties of magnetic lines of force.

• A. Magnetic lines of force start from south pole and end on north pole
• B. Magnetic lines of force intersect each other at the poles
• C. Magnetic lines of force are far from each other where the field is strong
• D. Tangent at any point on the magnetic lines of force gives the direction of the magnetic field at that point.

Answer 1

The correct option is D Tangent at any point on the magnetic lines of force gives the direction of the magnetic field at that point.

Magnetic line of forces are closed continuous curves which start from the north pole and end at the south pole of the magnet. A tangent at any point on the magnetic line of forces gives the direction of the magnetic field at that point. Thus no two magnetic field lines intersect with each other as it would give two different directions of magnetic field at that point which is impossible. Also magnetic line of forces are nearer to each other where the magnetic field is strong and vice-versa.

Hence statement given in option D is correct.