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Magnetic and Non-magnetic Material

It was observ...

Question

It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.

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Solution

Iron is used to make some part of sharpener due to which it is attracted toward magnet.

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Q. It is observed that a pencil sharpener gets attracted to both the poles of the magnet. Can you explain ?

Q. A pencil sharpener is attracted by a magnet, even though its body is made of plastic. Can you think of one reason why this happens?

Q. A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. The Effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements given in Column I with those in Column II.

Column I	Column II
Boat gets attracted towards the magnet	Boat is fitted with a magnet with a north pole towards its head
Boat is not affected by the magnet	Boat is fitted with a magnet with a south pole towards its head
Boat moved towards the magnet when the north pole is brought near its head	Boat has a small magnet fixed along its length
Boat moves away from the magnet when the north pole is brought near its head	Boat is made up of magnetic material
Boat floats without changing its direction	Boat is made up of non-magnetic material

If a bar magnet is brought closer to another bar magnet's head. It was observed that they attract each other. What are the poles of part 1 and part 2?

Q. Fill in the blanks with the correct words.
1. Only ..................... (magnetic/non-magnetic) materials are attracted by magnets.
2. Like poles of two magnets ..................... (attract/repel) each other.
3. A magnet that retains its properties for a very long period of time is called ..................... (electro/permanent) magnet.
4. A horseshoe magnet should be stored with a piece of ..................... (plastic/iron) across its poles.
5. A ......................................... (credit card/magnetic compass) is a devicer used to find directions.

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