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Chapters
2: Force and Pressure
3: Light
4: Heat
5: Electricity
6: Sound
▶ 7: Magnetism
8: Universe and Space Science
9: Matter around us
10: Changes around us
11: Air
12: Atomic Structure
13: Water
14: Acids and Bases
15: Chemistry in Everyday Life
16: Microorganisms
17: Plant Kingdom
18: Organisation of Life
19: Movements in Animals
20: Reaching the Age of Adolescence
21: Crop Production and Management
22: Conservation of Plants and Animals
23: Libre Office Calc
![Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 7 - Magnetism - Shaalaa.com](/images/science-english-class-8-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 7 - Magnetism")
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Solutions for Chapter 7: Magnetism
Below listed, you can find solutions for Chapter 7 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 8 TN Board.
Samacheer Kalvi solutions for Science [English] Class 8 TN Board 7 Magnetism Exercises [Pages 81 - 82]
Choose the best answer.
A magnet attracts ______.
wooden materials
any metal
copper
iron and steel
One of the following is an example for a permanent magnet.
Electromagnet
Mumetal
Soft iron
Neodymium
The south pole of a bar magnet and the north pole of a U-shaped magnet will _______.
attract each other
repel each other
neither attract nor repel each other
None of the above
The shape of the Earth’s magnetic field resembles that of an imaginary ______.
U-shaped magnet
straight conductor carrying current
solenoid coil
bar magnet
MRI stands for _______.
Magnetic Resonance Imaging
Magnetic Running Image
Magnetic Radio Imaging
Magnetic Radar Imaging
A compass is used for ______.
plotting magnetic lines
detection of magnetic field
navigation
All of these
Fill in the blanks.
The magnetic strength is _______ at the poles.
A magnet has _______ magnetic poles.
Magnets are used in _______ for generating electricity.
______ are used to lift heavy iron pieces.
A freely suspended bar magnet is always pointing along the ________ north-south direction.
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
Consider the statement given below and choose the correct option.
Assertion: Iron filings are concentrated more at the magnetic poles.
Reason: The magnets are so sharp.
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true, but the reason is not the correct explanation of assertion.
Assertion is true, but reason is false.
Assertion is false, but reason is true.
Consider the statement given below and choose the correct option.
Assertion: The Earth’s magnetic field is due to iron present in its core.
Reason: At a high temperature a magnet loses its magnetic property or magnetism.
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true, but reason is not the correct explanation of assertion.
Assertion is true, but reason is false.
Assertion is false, but reason is true.
Answer briefly.
Define magnetic field.
What is artificial magnet? Give examples.
Distinguish between natural and artificial magnets?
Earth acts as a huge bar magnet. Why? Give reasons.
How can you identify non-magnetic materials? Give an example of a nonmagnetic material.
Answer in detail.
List out the uses of magnets.
How will you convert a ‘nail’ into a temporary magnet?
Write a note on Earth’s magnetism.
Higher Order Thinking Questions.
Though Earth is acting as a huge bar magnet it is not attracting other ferromagnetic materials. Why? Give reasons.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
Thamizh Dharaga and Sangamithirai were playing with a bar magnet. They put the magnet down and it broke into four pieces. How many poles will be there?
Solutions for 7: Magnetism
Samacheer Kalvi solutions for Science [English] Class 8 TN Board chapter 7 - Magnetism
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Concepts covered in Science [English] Class 8 TN Board chapter 7 Magnetism are Discovery of Magnets, Magnet, Classification of Magnets, Magnetic Properties, Magnetic Field, Magnetic Materials, Artificial Magnets, Earth’s Magnetism, Uses of Magnets.
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