Magnetism Note Class 6

Magnetism

A. Very Short Questions

1. What is magnet?
   A magnet is an object that attracts iron, cobalt and some other metals.
2. Give an example of a magnetic substance.
   Iron is a magnetic substance.
3. Name a non-magnetic substance.
   Wood is a non-magnetic substance.
4. What is a magnetic field?
   Magnetic field is an area around a magnet where magnetic forces can be felt.
5. What are the two ends of a magnet called?
   The two ends of a magnet are called the North pole and South pole.
6. How can you make a temporary magnet?
   We can make a temporary magnet by using electrical method.
7. Can a magnet attract a wooden object?
   No, a magnet cannot attract a wooden object.
8. What happens when you heat a magnet?
   When we heat a magnet, it loses its magnetic properties.
9. Name the methods of making magnet.
   The methods of making magnet are:
   i) Stroking method
   ii) Electrical method
10. Give one example of a device that uses an electromagnet.
    One example of a device that uses an electromagnet is an electric bell.

B. Short Questions.

1. Name a natural magnet.
   Lodestone is a natural magnet.
2. What is magnetic force?
   Magnetic force is the force by which a magnet attracts or repels objects.
3. Define magnetism. Write down any three examples of magnetic materials.
   Magnetism is the property by which a magnet attracts or repels objects. The three examples of magnetic materials are iron, nickel and cobalt.
4. How many poles are there in magnet? What are they?
   There are two poles in magnet. They are the North pole and South pole.
5. Differentiate between magnetic and non-magnetic substances.
   

   Magnetic Substances	Non-magnetic Substances
   Magnetic substances are materials that are attracted by a magnet.	Non-magnetic substances are materials that are not attracted by a magnet.
   Examples: iron, nickel, cobalt, etc.	Examples: wood, plastic, paper, etc.

6. How we can change in magnetic strength of an electromagnet?
   We can change in magnetic strength of an electromagnet by the following ways.
   i) By increasing the voltage.
   ii) By increasing the number of turns in the coil.
7. Differentiate between magnet and magnetism.
   

   Magnet	Magnetism
   A magnet is an object that attracts iron and other magnetic materials.	Magnetism is the property by which a magnet attracts or repels objects.
   It has two poles (North and South).	It is the reason why magnets work.

8. Name the substance shown in the given figure. Also, write its two features.
   
   
   The substance shown in the given figure is bar magnet. Its two features are:
   i) It has two poles (North and South)
   ii) It attracts magnetic materials like iron and nickel.
9. Write down any two uses of electromagnet.
   The two uses of electromagnet are:
   i) Electric bell
   ii) Cranes for lifting heavy iron objects
10. Write any two methods of increasing the strength of an electromagnet.
    The two methods of increasing the strength of an electromagnet are:
    i) By increasing the voltage.
    ii) By increasing the number of turns in the coil.

C. Long Questions.

1. A substance attracts iron and nickel. Now, answer the following questions.
   a) What is the name of the substance?
   The name of the substance is magnet.
   b) Write any two uses of that substance.
   The two uses of that substance are:
   i) It is used to find directions (in a compass).
   ii) It is used to separate iron objects from waste.
   c) Write any two properties of that substance.
   The two properties of that substance are:
   i) It has two poles (North and South)
   ii) It attracts magnetic materials like iron and nickel.
   d) Write any one method of making magnet.
   One method making magnet is stroking method.