Question

Which is not a property of the magnetic lines of force around a circular coil carrying current?

Options

• The lines of force are parallel at the points where the current enters or leaves.

• Within the space enclosed by the coil, the lines of force are in same direction.

• Near the centre of coil the lines of forces are almost parallel.

• With the increase in strength of current coil, the number of magnetic field lines increase.

Answer 1

The lines of force are parallel at the points where the current enters or leaves.

Explanation:

This statement is false. Near the points where the current enters or leaves the coil, the lines of force are nearly circular, not parallel. The other statements are correct properties: inside the coil, the lines are in the same direction; near the center, they are almost parallel; and increasing the current increases the number of field lines.