Extra Questions for Chapter 4 Exploring Magnets Class 6 Science Curiosity
Class 6 Science Exploring Magnets Extra Questions
Multiple Choice Questions (MCQ)
Question 1. Which of the following materials is magnetic?
(a) Wood
(b) Plastic
(c) Iron
(d) Glass
Answer
(c) Iron
Question 2. What are the two poles of a magnet called?
(a) North and South
(b) East and West
(c) Up and Down
(d) Left and Right
Answer
(a) North and South
Question 3. What happens when two North poles of magnets are brought together?
(a) They attract each other
(b) They repel each other
(c) They stick together
(d) Nothing happens
Answer
(b) They repel each other
Question 4. In which device is a magnetized needle used to find directions?
(a) Barometer
(b) Thermometer
(c) Compass
(d) Altimeter
Answer
(c) Compass
Question 5. Which of the following is a non-magnetic material?
(a) Cobalt
(b) Nickel
(c) Rubber
(d) Iron
Answer
(c) Rubber
Fill in the Blanks
1. Magnets can attract materials such as ____.
2. A freely suspended magnet aligns itself in the ____ direction.
3. The _____ of a magnet is where the magnetic force is strongest.
4. The ancient Indian navigation tool was called _____.
5. Non-magnetic materials include _____, plastic, and glass.
Answer
1. iron
2. north-south
3. poles
4. Matsya-Yantra
5. wood
True or False
1. A magnet can have only one pole.
2. Iron, nickel, and cobalt are examples of magnetic materials.
3. A magnetic compass uses the Earth's magnetic field to find directions.
4. Like poles of two magnets attract each other.
5. The North pole of a magnet is usually painted blue.
Answer
1. False
2. True
3. True
4. False
5. False
Match the Following
| Column A | Column B |
| 1. North Pole | A. Attracts opposite poles |
| 2. South Pole | B. Used for navigation |
| 3. Magnetic Compass | C. Magnet’s strongest point |
| 4. Attraction | D. Points towards the North |
| 5. Poles of a Magnet | E. North and South |
Answer
| Column A | Column B |
| 1. North Pole | D. Points towards the North |
| 2. South Pole | E. North and South |
| 3. Magnetic Compass | B. Used for navigation |
| 4. Attraction | C. Magnet’s strongest point |
| 5. Poles of a Magnet | A. Attracts opposite poles |
One Word Answer
Question 1. What materials are attracted to magnets?
Answer
Iron, nickel, and cobalt
Question 2. Name a non-magnetic material.
Answer
Wood
Question 3. What are the two poles of a magnet called?
Answer
North Pole and South Pole
Question 4. In what direction does a freely suspended magnet point?
Answer
North-South direction
Question 5. What device helps find directions using a magnet?
Answer
Magnetic compass
Question 6. What is the purpose of the red-painted end of a compass needle?
Answer
It indicates the North direction
Question 7. What happens when opposite poles of two magnets are brought close together?
Answer
They attract each other
Question 8. If a bar magnet is cut lengthwise into three parts, how many poles will form?
Answer
Six
Question 9. Which materials are attracted to magnets?
Answer
Iron, nickel, and cobalt
Question 10. What is the result when like poles of magnets are near each other?
Answer
They repel each other
Question 11. What is a common application of magnets in games?
Answer
Magnetic mazes
Question 12. What should you avoid to keep magnets safe?
Answer
Heating, dropping, or hammering them.
Question 13. Name the device that is similar to magnetic compass which was used by Indians for navigation at sea.
Answer
Matsya-Yantra or Machchh-Yantra
Question 14. At which place on a magnet, its magnetic force is maximum?
Answer
At poles
Question 15. How can magnets be used to make objects float?
Answer
By using opposing magnetic forces.
Question 16. Write the name of the source of natural magnetic.
Answer
Lodestone
Question 17. What type of devices should magnets be kept away from?
Answer
Electronics like mobile phones
Very Short Answer Question
Question 1. What are magnetic materials?
Answer
Magnetic materials are those that are attracted towards a magnet, such as iron, nickel, and cobalt.
Question 2. In which direction does a suspended magnet come to rest?
Answer
Magnet comes to rest in N-S (north-south) direction.
Question 3. What happens when a magnet is broken into smaller pieces?
Answer
When a magnet is broken into smaller pieces, each piece becomes a new magnet with its own North and South poles.
Question 4. Why do iron filings stick more at the poles of a magnet?
Answer
The magnetic force is strongest at the poles.
Question 5. How can you identify the North and South poles of a bar magnet using another magnet?
Answer
You can bring one end of a known magnet near the unmarked magnet. If it repels, it indicates the like poles (North-North or South-South), helping identify the poles.
Question 6. How can you identify the North pole of a magnet?
Answer
It is often labelled "N" or marked with a white dot.
Question 7. What defines a material as magnetic?
Answer
A material is considered magnetic if it is attracted to a magnet. Metals like iron, nickel, and cobalt, along with some of their alloys, exhibit this property.
Question 8. Where do few or no iron filings (or pins) stick on a magnet?
Answer
Few or no iron filings stick to the middle part of the magnet. The magnetic effect is least in this part.
Question 9. What is the Matsya-Yantra?
Answer
An ancient Indian navigation tool similar to a compass.
Question 10. How can you make a simple compass at home?
Answer
Use a sewing needle, cork, and water.
Question 11. What happens when you rotate a compass and let it go?
Answer
It settles back to point North-South.
Question 12. How can you lift a steel paper clip from water using a magnet?
Answer
By using a magnet without touching the water.
Question 13. What is a compass used for?
Answer
To show direction using a magnetized needle.
Short Answer Questions
Question 1. Identify magnetic and non-magnetic substances from the list given below:
Iron, Steel, Nickel, Plastic, Wood, Gold, Copper, Glass, Silver.
Answer:
|
Magnetic substance |
Non-magnetic substance |
|
Iron, steel, cobalt, nickel |
Plastic, wood, paper, copper, glass, gold, silver |
Question 2. Few iron nails and screws got mixed with the wooden shredding while a carpenter was working with them. How can you help him in getting the nails and screws back from the scrap without wasting his time in searching with his hands?
Answer
With the help of a magnet we can attract all iron nails and screws and can separate them from the wooden shredding. As iron nails and screws are magnetic materials and will get attracted to the magnet, whereas wooden shavings are non-magnetic.
Question 3. It is said that repulsion is a sure test for magnetism. Why is it so?
Answer
To identify the magnet, repulsion (like poles of two magnets repel) is the only test which will let you know whether the given rod is an iron rod or a bar magnet. Because a magnet attracts an iron object and unlike poles of magnets also attract each other.
Question 4. Choose magnetic substances from given items:
(i) Rubber
(ii) Alpin
(iii) Nail
(iv) Cotton cloth
(v) Cobalt
(vi) Copper
(vii) Iron
(viii) Gold
Answer
Magnetic substances – (i) Alpin (ii) Nail (v) Cobalt (vii) Iron
Question 5. Are both poles of a magnet similar?
Answer
No, the two poles of a magnet are not similar (alike). Both have different tendency. The pole that points towards the north is called north-pole while the pole pointing always towards the south is called south-pole.
Question 6. In which direction does freely suspended magnet rest?
Answer
A freely suspended magnet always points in the north-south direction.
Question 7. Mention some important precautions to handle magnets.
Answer
- Do not heat
- Do not hammer
- Do not drop
Question 8. How do the shipmen find the direction even when north pointing pole star is not visible?
Answer
Shipmen during navigation can find the “direction with the help of magnetic needle.
Question 9. Why does a freely suspended magnet always rest in north-south direction?
Answer
A freely suspended magnet always rest in north-south direction because the north-pole of the magnet lies in the geographic north direction and the south pole of the magnet lies in the geographic south direction. So it aligns itself in N-S direction.
Long Answer Questions
Question 1. Do magnetic poles exist separately like charges? Explain.
Answer
Magnetic poles do not exist separately like positive and negative charges. This means that it is not possible to isolate a north pole of a magnet from its south pole by cutting the magnet from the middle. Whenever a bar magnet is cut into two halves, we get two new magnets, each with its north and south poles. This will continue indefinitely even if extremely small pieces of bar magnets are obtained. Thus magnetic poles always exist in pairs.
Question 2. Where are the poles of a ring magnet? How will you find this?
Answer
Ring type or circular magnet also has two poles. Its exterior and interior parts act like different poles.
To find out the nature of the two poles, we suspend circular magnet with a piece of thread. We bring another magnet near it. Both attract each other. It clearly concludes that one surface of the circular magnet is attracted but the other surface is repelled by the same pole of the other magnet.
Question 3. How can you show that unlike poles attract each other while like poles repel each other?
Answer
Suspend a magnet on a stand with the help of a string. Now it rests in N-S directions. Take another magnet which has been marked NTS on it and bring N-pole of this magnet near the N-pole of the suspended magnet. You will find that the suspended magnet rotates and moves away showing that like poles repel each other. The same can be repeated by bringing south-pole of one magnet near south-pole of suspended magnet.
Now you must have found that during the above experiment, south-pole comes towards north-pole and vice versa. It can be repeated by bringing south-pole near a north-pole and north-pole near south-pole of suspended magnet. You will find that unlike poles attract each other.
Question 4. Manish dipped a bar magnet in a heap of iron filings and pulled it out. He found that iron filings got stuck to the magnet as shown in the figure. Suddenly magnet get slipped from his hands and broken in three pieces.
I. Which regions of the magnet have more iron filings sticking to it?
II. What are these regions called?
III. Is broken pieces have some magnetic property?
IV. How many poles three pieces have all together?
Answer
I. The magnet has more iron filings attached to its two ends.
II. Magnets have two poles, namely the North Pole (N) and the South Pole (S). Hence, these regions are called ‘poles’ of the magnet.
III. Yes, all the three pieces have magnetic property.
IV. Each piece has two poles as before the broken of magnet, so there are ‘Six’ poles.
Question 5. What are the precautions need to be taken while handling a magnet
Answer
When heated, hammered or dropped from a height, magnets tend to lose their properties. They become weak if they are not stored properly and hence:
- Bar magnets should be stored in pairs separated by a small block of wood and their unlike poles facing the same side with a soft iron across their ends.
- A piece of iron should be kept across the poles in case of a horse shoe magnet.
- Magnets should be kept away from computers, mobiles, televisions etc.
- Magnets should be handled with care and they should be stored properly.