Question

With the help of a labelled circuit diagram, illustrate the pattern of the magnetic field lines of the magnetic field produced around a straight current carrying conductor. Explain how, with the help of right-hand thumb rule, we can determine and mark the direction of magnetic field lines due to a current.

Hint:

Use right-hand thumb rule for direction: thumb = current, fingers = field lines.

Answer 1

Pattern: A straight, current-carrying conductor generates concentric circular magnetic field lines. Field strength diminishes with distance from the wire.
Right-Hand Thumb Rule: Grasp the conductor with your right hand, thumb pointing in the current's direction. Your curled fingers indicate the magnetic field's direction.