Concept of a magnetic field

Need to know

What you need to know

• **Direction:** Field lines point from North to South poles outside a magnet.
• **Strength:** The density of the lines (how close they are) represents the field strength. Closer lines mean a stronger field.
• **No Crossing:** Magnetic field lines never cross each other, as the field has a unique direction at any given point.
• **Continuity:** They form continuous closed loops, passing through the magnet from South to North internally to complete the circuit.

Explanation

Concept of a magnetic field

1. **Direction:** Field lines point from North to South poles outside a magnet.
2. **Strength:** The density of the lines (how close they are) represents the field strength. Closer lines mean a stronger field.
3. **No Crossing:** Magnetic field lines never cross each other, as the field has a unique direction at any given point.
4. **Continuity:** They form continuous closed loops, passing through the magnet from South to North internally to complete the circuit.