Attraction And Repulsion Between Magnets

Key Notes :

1. What is a Magnet?
– A magnet is an object that produces a magnetic field around it.

2. Two Types of Poles:
– Every magnet has two poles: North (N) and South (S).
– Opposite poles attract each other (N-S) and like poles repel each other (N-N or S-S).

3. Magnetic Field:
– A magnet’s magnetic influence is in the form of a magnetic field, which is invisible but can be felt with other magnets.

4. Attraction:
– When you bring the North pole of one magnet close to the South pole of another, they will attract each other.

5. Repulsion:
– When you bring the North pole of one magnet close to the North pole of another or the South pole of one magnet close to the South pole of another, they will repel each other.

6. Magnetic Materials:
– Some materials, like iron, nickel, and cobalt, can be attracted to magnets. They are called magnetic materials.

7. Non-Magnetic Materials:
– Materials like wood, plastic, and glass are not attracted to magnets and are considered non-magnetic.

8. Magnetic Fields Lines:
– Magnetic field lines are imaginary lines that show the direction of the magnetic field. They point from the North pole to the South pole outside the magnet.

9. Earth’s Magnetic Field:
– Earth itself acts like a giant magnet with a North and South pole. It has a magnetic field that influences compass needles.

10. Uses of Magnets:
– Magnets are used in many everyday objects, like refrigerator magnets, and compasses, and in technology such as electric motors and MRI machines.

11. Magnetic Poles Cannot Be Isolated:
– If you cut a magnet in half, you will not get a North pole and a South pole. Instead, you will create two smaller magnets, each with its own North and South pole.

12. Magnetic Strength:
– Some magnets are stronger than others. The strength of a magnet is measured in units called Gauss or Tesla.

Let’s practice!