Question

A positive charge is moving towards a observer. The direction of magnetic field lines will be in

Answer 1

Magnetic field:

1. Magnetic field lines formed by an electric charge have a distinct personality.
2. The force of a positive charge is exactly the opposite to that of a negative charge.
3. The magnetic field lines of a moving charge are always perpendicular to the plane formed by velocity and magnetic force.
4. We can now determine the direction of magnetic field lines by pointing the right-hand thumb in the direction of travel of a negatively charged particle.
5. The direction of magnetic field lines is indicated by the curls of the fingers.
6. Because the charge is moving towards the observer, pointing the thumb in that direction causes the fingers to curl anticlockwise, causing the magnetic field line to move anticlockwise to the observer.

Thus, the direction of magnetic field lines is in an anticlockwise direction.