Tender magnet exam for s.2 end of term 2 2024 ?

1. What is a magnet?
2. What are the properties of a magnet?
3. How can you identify the poles of a magnet?
4. Explain the concept of magnetic field lines.
5. What is the difference between a permanent magnet and an electromagnet?
6. How can you demagnetize a magnet?
7. Describe the applications of magnets in everyday life.
8. What is magnetic induction?
9. Explain the working principle of a magnetic compass.
10. How can you increase the strength of a magnet?

Section A: Multiple Choice (20 marks)

1. Which of the following is a property of a magnet?
(a) Attracts only iron
(b) Attracts all metals
(c) Has a north and south pole
(d) Creates a magnetic field

2. The magnetic field lines around a bar magnet are:
(a) Random
(b) Parallel
(c) Circular
(d) Spiral

3. Which of the following materials is not magnetic?
(a) Iron
(b) Steel
(c) Copper
(d) Nickel

4. The magnetic force between two magnets is strongest when their:
(a) North poles are facing each other
(b) South poles are facing each other
(c) North and south poles are facing each other
(d) Poles are not aligned

5. Which of the following can demagnetize a magnet?
(a) Heating it
(b) Dropping it
(c) Storing it near other magnets
(d) All of the above

Section B: Short Answer (30 marks)

1. Describe the difference between a permanent magnet and a temporary magnet.
2. Explain how a magnetic field is created.
3. Draw a diagram showing the magnetic field lines around a bar magnet.
4. Explain why a magnet is not attracted to aluminum.
5. Describe two applications of magnets in everyday life.

Section C: Extended Response (50 marks)

1. Discuss the factors that affect the strength of a magnet.
2. Explain the principles of electromagnetic induction and how it is used in a simple generator.
3. Describe an experiment to investigate the magnetic field produced by a current-carrying wire.

Answer Scheme

Section A:

1. c
2. c
3. c
4. c
5. d

Section B:

1. - Permanent magnet: Retains its magnetism permanently.
- Temporary magnet: Loses its magnetism when the magnetizing force is removed.
2. By the movement of electric charges.
3. [Diagram of magnetic field lines around a bar magnet]
4. Aluminum is a non-magnetic material.
5. - Refrigerator magnets
- MRI scanners

Section C:

1. - Material used
- Shape and size
- Temperature
2. - Moving a conductor through a magnetic field induces an electric current.
- Generator: Converts mechanical energy into electrical energy.
3. - Set up a circuit with a battery, wire, and galvanometer.
- Pass a current through the wire.
- Use the galvanometer to detect the magnetic field.