Question

We have piece of iron. We don’t know whether it is a permanent magnet or a normal iron piece (not magnetized). To check whether it is a normal iron piece or a permanent magnet, we bring it close to a nail wound with copper wire and connected to a battery as shown in the figure.

Answer 1

Answer:

If the nail repels the piece of iron, we can say that it is a permanent magnet.

Explanation:

Answer 2

When we bring  piece of iron close to a nail wound with copper wire and connected to a battery it acts as an electromagnet.

Explanation:

• Given- We have piece of iron. We don’t know whether it is a permanent magnet or a normal iron piece.

• To check whether it is a normal iron piece or a permanent magnet.

• If the nail repels the piece of iron, we can say that it is a permanent magnet.
• When we bring  piece of iron close to a nail wound with copper wire and connected to a battery it acts as an electromagnet.
• An electromagnet is a temporary magnet
• It will behaves like a magnet when an electric current is passed through the insulated copper wire connected to a battery and loses its magnetism when current is stopped. It has a soft iron piece called the core with an insulated copper wire wound on it.

#SPJ2