Question

As we move away from a current-carrying conductor, the spacing between the magnetic field lines

• A. Increases.
• B. Decreases.
• C. Remains equidistant.
• D. Becomes parallel.

Answer 1

The correct option is A

Increases.

The factors on which the magnetic field created by a conductor carrying current depends are as follows:

• The magnetic field produced is proportional to the electric current passing through the conductor. When the magnitude of an electric current increases, so does the intensity of the magnetic field.
• The generated magnetic field is proportional to the distance between the conductor carrying current and the magnetic field. As a result, the magnetic field becomes stronger as you get closer to the conductor carrying current. As one moves away from the conductor carrying current, the density of the field lines decreases.

Thus, the spacing between the magnetic field lines increases as one moves away from the conductor.

Hence, option (A) is correct.