PHYS - Magnetism
Physics, magnetism - IBDP | DSE | GCE | IAL | AP Physics
Properties of Magnets
- Magnets have two poles: north pole (N) and south pole (S)
- Same poles repel each other, and opposite poles attract each other.
- Magnetically hard materials retain their magnetization once they are magnetized and become permanent magnets. e.g. steel
- Magnetically soft materials lose their magnetization easily. e.g. iron
Frequently asked in IGCSE Physics are questions on drawing magnetic field lines.
Magnetic Field Lines
- Magnetic field is space around a magnet where magnetic force can be detected.
- Although actual magnetic field cannot be seen, we can visualize magnetic field with imaginary magnetic field lines.
- Magnetic field lines shows
When two bar magnets of opposing poles are placed closely, the region between the two magnets will experience uniform magnetic field, as shown below. That is, the field lines are parallel to each other.
In IGCSE Physics, you should know how to visualize magnetic field lines experimentally.
I. Using iron filings - When you spread iron filings near a magnet, the iron filings line up along the magnetic field line.
II. Using compass - When you place compasses near a magnet, the compass will point in the direction of the magnetic field line.
Wanna Boost Up Your IGCSE Physics?
We just sent you an email. Please click the link in the email to confirm your subscription!