Natural and Artificial Magnets Class-6th Goyal Brothers Physics Solutions Chapter-6, Unit 1. We Provide Step by Step Answers of Objective, True/False, Correct/incorrect, Fill in the blanks, Match the following , Study Questions of Chapter-6, (Magnetism), Unit-1 (Natural and Artificial Magnets). Visit official Website CISCE for detail information about ICSE Board Class-6.
Natural and Artificial Magnets Class-6th Goyal Brothers Physics Solutions Chapter-6 (Unit 1)
| Board | ICSE |
| Class | 6th |
| Subject | Physics |
| Book Name | Goyal Brothers |
| Theme-6 | Magnetism |
| Unit-1 | Natural and Artificial Magnets |
| Topic | Solution of exercise questions |
| Session | 2023-24 |
OBJECTIVE TYPES QUESTIONS
Natural and Artificial Magnets Class-6th Goyal Brothers Physics Solutions Chapter-6 (Unit 1)
Que: A. Fill in the blank spaces by choosing the correct words from the list given below:
List: magnetic, non-magnetic, magnetite, artificial, directive
1. Natural magnets are made from a rock called __magnetite__ .
2. A magnet has __directive__ as well as attractive property.
3. Cobalt is a __magnetic__ metal.
4. The substances which cannot be magnetized are called __non-magnetic__ substances.
5. __artificial__ magnets can be made in any size or shape.
Que: B: State whether the following statements are true or false:
| Statements | True/False |
| 1. Gold is a ferromagnetic substance. | F |
| 2. Chemically magnetite is Fe2O3. | T |
| 3. Artificial magnets are more powerful than natural magnets. | F |
| 4. Coins are attracted to a bar magnet as they contain nickel. | T |
| 5. A U-shaped permanent magnet attracts iron less strongly than a bar magnet. | F |
Que: C. Statements given below are incorrect. Write the correct statements:
Question: 1. Aluminium is a magnetic substance.
Answer: Aluminium is a non-magnetic substance.
Question: 2. Steel is a non-magnetic substance.
Answer: Steel is a magnetic substance.
Question: 3. Natural magnets are more powerful than artificial magnets.
Answer: Artificial magnets are more powerful than natural magnets.
Question: 4. The name of substance which constitutes natural magnet is magnesite.
Answer: The name of substance which constitutes natural magnet is magnetite.
Question: 5. A horse shoe magnet causes less magnetic attraction than a bar magnet.
Answer: A horse shoe magnet has more magnetic attraction than a bar magnet.
Que: D. Tick (√) the most appropriate answer:
1. A very weak magnet is :
(a) Natural magnet
(b) Bar magnet
(c) Horse shoe magnet
(d) magnetic needle
Answer: option (d) magnetic needle is correct.
2. A freely suspended magnet has:
(a) Attractive property
(b) Directive property
(c) Both (a) and (b)
(d) none of the above
Answer: option (c) Both (a) and (b) is correct.
3. A very powerful magnetic substance is prepared by mixing magnetite with:
(a) calcium oxide
(b) copper oxide
(c) barium oxide
(d) none of these
Answer: option (a) calcium oxide is correct.
4. Lode stone is an example of :
(a) natural magnet
(b) artificial magnet
(c) electromagnet
(d) none of these
Answer: option (a) natural magnet is correct.
5. When a freely suspended magnetic needle comes to rest it points in:
(a) east-west direction
(b) north-east direction
(c) north-south direction
(d) north-west direction
Answer: option (c) north-south direction is correct.
Que: E. Match the statements in Column A, with those in Column B:
| Column A | Column B |
| 1. The formula of the chemical present in natural magnet. | (a) Ferromagnetic substances |
| 2. Name of substance made by mixing ferric oxide and barium oxide. | (b) Fe2O4 |
| 3. A freely suspended magnetic strip used for finding geographic directions. | (c) Magnetism |
| 4. A group of four metals which can be easily magnetized. | (d) Ferrite |
| 5. The phenomenon due to which a substance attracts small pieces of iron. | (e) Magnetic needle |
Answer:
| Column A | Column B |
| 1. The formula of the chemical present in natural magnet. | (a) Fe2O4 |
| 2. Name of substance made by mixing ferric oxide and barium oxide. | (b) Ferrite |
| 3. A freely suspended magnetic strip used for finding geographic directions. | (c) Magnetic needle |
| 4. A group of four metals which can be easily magnetized. | (d) Ferromagnetic substances |
| 5. The phenomenon due to which a substance attracts small pieces of iron. | (e) Magnetism |
STUDY QUESTIONS
Natural and Artificial Magnets Class-6th Goyal Brothers Physics Solutions Chapter-6 (Unit 1)
Question: 1. (a) What is a magnet?
Answer: (a) An object which is capable of producing magnetic field and attracting unlike poles and repelling like poles.
Question: (b) What is a natural magnet? Name the chemical formula of compound present in it.
Answer: (b) Natural magnet: Magnet was discovered in a town of Magnesia in Asia Minor (Greece). Magnet is formed by a blackish rock known as magnetite. This occurs naturally in the earth’s surface. A natural magnet is an ore of iron that attracts small pieces of iron, cobalt, and nickel towards it. Natural magnets are permanent magnets.
These have magnetic properties of attraction-repulsion and directive. It is usually an oxide of iron known as iron oxide.
Chemical formula: Chemically the compound present in natural magnet is represented as Fe3O4.
Question: 2. (a) What are artificial magnets?
Answer: (a) Magnets which are made from iron in different shape and sizes for different uses are called artificial magnets. It is a magnetized piece of iron, steel, cobalt, or nickel. These magnets are of different sizes and shapes.
Question: (b) Draw neat diagrams of four artificial magnets.
Answer: (b)
Question: 3. Why are artificial magnets preferred to natural magnets?
Answer: Natural magnets are weaker than artificial magnets and are often irregular in shape. Whereas artificial magnets can be made of any strength and can be magnetized and demagnetized easily as per the requirements. That’s why artificial magnets are preferred over natural magnets.
Question: 4. Name four devices which use artificial magnets.
Answer: Four devices that uses artificial magnet:
- Loudspeaker
- Telephones
- Radios
- Television
Question: 5. What is ferrite? What are its uses?
Answer: Ferrite, a ceramic-like material with magnetic properties that are useful in many types of electronic devices. Ferrite is used in: Permanent magnets. Ferrite cores for transformers and toroidal inductors. Computer memory elements.
Question: 6. Define (a) magnetic substances, (b) non-magnetic substances. Give four examples of each.
Answer: Magnetic substances are those which are attracted by a magnet. Examples of magnetic substances are iron, nickel, cobalt, etc.
Non-magnetic substances are those which are not attracted by magnets. Examples of non-magnetic substances are wood, copper, plastic, etc.
Question: 7. Why is a 5 rupees coin attracted by a magnet? Name the metal present in the coin.
Answer: The substances that can be easily magnetized and are attracted towards magnet are known as magnetic materials. Cobalt, nickel, iron are some examples of magnetic materials. Coins contain nickel, that is why they are attracted towards magnets.
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