Question

Which is not the property of magnetic lines of force around a straight conductor carrying current?

Options

• When magnitude of current is low in a conductor the lines of force are parallel to the direction of current.

• The magnetic lines of force are in the form of concentric circles.

• The plane of magnetic lines of force is always at right angles to the straight conductor carrying current.

• The direction of magnetic lines of force reverses with the reversing of the direction of current.

Answer 1

When magnitude of current is low in a conductor the lines of force are parallel to the direction of current.

Explanation:

Around a straight current-carrying conductor, the magnetic lines are concentric circles in a plane perpendicular to the conductor; they are never parallel to the current. The other statements are correct properties of these lines.