Page 117 - Physics_Form_2

Magnetism

and enter the south pole, and back to the north pole, forming a closed loop.
3. Magnetic lines of force are close together where the magnetic force is stronger,
and they are far apart where the magnetic force is weaker.
4. Magnetic lines of force never cross one another.
5. Parallel magnetic lines of force in the same direction repel one another. Parallel
magnetic lines of force in opposite directions attract one another as shown in Figure
FOR ONLINE READING ONLY
3.34.

Unlike poles attract

Like poles repel
Figure 3.34: Unlike poles attract and like poles repel
6. Magnetic lines of force pass through magnetic and non-magnetic materials.
7. Magnetic lines of force always enter or leave a magnetic material at right angles
to the surface.

Neutral points in a magnetic field spot, these fields exactly cancel out,
At any point where two different magnetic creating a neutral point labelled X. As a
fields exist, a stronger field is created result, there is no magnetic force present
if they are in the same direction, but a at neutral points.
weaker field arises if they are in opposite
directions. The two fields can balance Neutral point
each other at one point.

A neutral point is a location where the
total magnetic field equals zero.

For instance, if two bar magnets are
positioned close to each other as
illustrated in Figure 3.35, their magnetic
fields oppose one another. At a certain Figure 3.35: Neutral point

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Physics Form 2 Final.indd 111 25/10/2025 10:26