The magnetic lines of force due to a bar magnet

CONCEPT:

Magnetic Field Lines:

• The magnetic field lines are invisible lines of magnetic force that never cross each other.
• And can be drawn putting iron dust or compass in the magnetic field of the bar magnet.
• Magnetic field lines are continuous and always form a unique closed loop around the magnet.
• Magnetic field lines have a definite direction from North to South.
• Magnetic field lines of force that are close together indicate a strong magnetic field.
• Magnetic field lines of force that are farther apart indicate a weak magnetic field.

EXPLANATION:

• Magnetic field lines never intersect with each other.

• Unlike poles means North and South attract each other.
• Like poles means North and North repels each other.