Question

describe an experiment to prove that a magnet has two poles​

Answer 1

In this demonstration, there are two bar magnets like before and they are placed on top of wheels so they can move freely. The magna-carts, as we call them, have there opposite poles toward each other for this demonstration.

What you have been observing is the behavior of the north and south poles of a magnet. One end of any bar magnet will always want to point north if it is freely suspended. This is called the north-seeking pole of the magnet, or simply the north pole. The opposite end is called the south pole. The needle of a compass is itself a magnet, and thus the north pole of the magnet always points north, except when it is near a strong magnet. In Experiment 1, when you bring the compass near a strong bar magnet, the needle of the compass points in the direction of the south pole of the bar magnet. When you take the compass away from the bar magnet, it again points north. So, we can conclude that the north end of a compass is attracted to the south end of a magnet.

This can be a little confusing since it would seem that what we call the North Pole of the Earth is actually its magnetically south pole. Remember that a compass is a magnet and the north pole of a magnet is attracted to the south pole of a magnet. This situation is also seen in Experiment 1 & 2. In Experiment 2, when you move the north pole of a magnet toward the south pole of the other magnet, the two magnets attract. However, in Experiment 3, when you move the south pole of a magnet toward the south pole of another magnet, the two magnets repel each other and you cannot move them together. The rule for magnetic poles is that like poles repel each other and unlike poles attract each other.

Answer 2

Aim: To show that a magnet has two poles

Materials Required: Bar magnet,iron filings,cardboard

Procedure:

• take a white sheet/cardboard and place the iron filings on it

• run the magnet through the iron filings

Observation: We can observe that the iron filings mostly stick to the two ends of the magnet.

Result: The ends where most of the iron filings stick are said to be the poles of the magnet.