ICSE Worksheet for Chapter - 9 Magnetism & Electromagnetism Class 8

Worksheets For class 8

Find ICSE Worksheet for chapter-9 Magnetism & Electromagnetism class 8

1. CLASS-8
2. BOARD: ICSE
3. PHYSICS Worksheet - 9
4. TOPIC: Magnetism & Electromagnetism
5. For other  ICSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY

• Magnets –Types, properties, Magnetic field, Magnetic field of the earth
• Electromagnetism, Magnetic field due to a straight and circular current carrying wire
• Solenoid, Uses of Electromagnets, Electric bell, Electric motor, Dynamo, Transformer

SECTION I – OBJECTIVE

1. If we suspend a magnet freely, it will settle in
   1. East-west direction
   2. North-south direction
   3. North-east direction
   4. East-south direction
2. The attraction of magnetic substance by poles of a magnet is
   1. Minimum
   2. Zero
   3. Maximum
   4. None of these
3. For a given magnet
   1. North Pole is stronger than South Pole
   2. Both poles are of equal strength
   3. South Pole is stronger than North Pole
   4. None of these
4. An example of natural magnet is
   1. Iron
   2. Steel
   3. Lodestone
   4. None of these
5. The magnetic lines of force due to a bar magnet are
   1. Continuous and intersecting
   2. Discontinuous and non-intersecting
   3. Continuous and non-intersecting
   4. Continuous and crowded at the middle of the magnet
6. An electric motor converts:
   1. Potential energy into kinetic energy
   2. Kinetic energy into electrical energy
   3. Electrical energy into mechanical energy
   4. Potential energy into mechanical energy
7. The primary coil of a transformer:
   1. Is connected to an A.C. source
   2. Connected to a D.C. source
   3. Converts A.C. into D.C.
   4. None of these
8. Space around a magnet where its influence is felt is called as
   1. Electric field
   2. Magnetic field
   3. Battle field
   4. NOT
9. A device to step up or step down a.c. voltage
   1. Electric motor
   2. Dynamo
   3. Transformer
   4. NOT
10. Which of the following represents a magnetic material?
    1. Aluminium
    2. Copper
    3. Silver
    4. Cobalt

SECTION II - SUBJECTIVE

1. What are the important uses of magnet?
2. Give the properties of magnet lines of force.
3. Write short note on :
   1. An electromagnet
   2. a dynamo
4. Name two factors on which the strength of magnetic field of an electromagnet depends.
5. By drawing a labeled diagram of an electric bell, explain its working.

Solutions: to worksheet-9 Topic- Magnetism & Electromagnetism

Objective Problems: