Question

The magnetic lines of force around an infinitely long straight current carrying

conductor are

(a) Concentric circles around conductor (b) Parallel to length of conductor

(c) Perpendicular to length of conductor (d) None​

Answer 1

Explanation:

•The nature of the magnetic field lines around a straight current carrying conductor is concentric circles with centre at the axis of the conductor. The strength of the magnetic field created depends on the current through the conductor.

Answer 2

The magnetic lines of force around an infinitely long straight current carrying  conductor are  concentric circles around conductor.

• We must always keep in mind that magnetic field lines are closed loop.
• If we look at the options then we can conclude that option A must be current, because the magnetic field lines differ radially, which means that they differ when we move in a direction but are same on all the points that lie on the same circle.
• In other options the field lines are not closed loops of magnetic field lines.