Introduction
Magnetism is a physical phenomenon produced by the motion of electric
charges, leading to attractive or repulsive forces between objects. It is a
fundamental force that has significant applications in various fields,
including electronics, healthcare (MRI machines), and energy production.
Real-life Example:
• A refrigerator door using magnets to stay closed.
• The Earth itself acts as a giant magnet, with a magnetic field that
protects us from solar radiation.
Questions:
1. What is magnetism?
2. Give two examples of the application of magnetism in real life.
Magnetic Field Pattern
A magnetic field is a region around a magnet where magnetic forces can
be detected. It is represented using magnetic field lines, which have the
following characteristics:
• They start from the North Pole and end at the South Pole of a
magnet.
• They never cross each other.
• The closer the lines, the stronger the magnetic field.
Real-life Example:
• The magnetic field around a bar magnet can be visualized using iron
filings.
