Page 128 - Physics_Form_2

Physics for Secondary Schools
6. Differentiate between a force due
to a magnet from the force due to
gravity on the earth.
7. (a) How do you know that a certain
material is magnetic in nature?
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(b) State the law of polarity and
illustrate it using sketch
diagrams.
(c) Suppose you are in the physics
laboratory and you are given
a bar magnet whose poles are
not labelled. Describe how you
could determine which end of
the bar is the north pole.
8. (a) State three applications of
magnets.
(b) Draw the following sketch
diagrams:
(i) Arrangement of domains
of dipoles in unmagnetised
iron bar.
(ii) Arrangement of domains
of dipoles in a magnetised
iron bar.
(c) Explain what would happen if
you cut a bar magnet into half.
9. (a) Describe the magnetisation process.
(b) How can a permanent magnet
be demagnetised?
(c) Explain the type of force that a
magnet experiences.
10. (a) What are magnetic lines of
force?
(b) Analyse the properties of lines
of force.
(c) Describe the process of magnetic
shielding.
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Physics Form 2 Final.indd 122
11. Suppose you mount a bar magnet on
a set of rubber wheels as shown in
Figure 3.56.
Front Rear
Figure 3.56
If you place the ‘magnetic car’ on
the magnetic N–S line with the front
of the car pointing to the geographic
north, would it roll towards the north
or towards the south? Explain your
answer.
12. (a) You are given 4 strong bar
magnets; is it possible to build
the objects shown in Figure
3.57?
Figure 3.57
(b) Draw diagrams indicating each
magnet’s north and south poles.
13. You are given two iron bars, A and
B, that look identical as shown in
Figure 3.58. One of them is a strong
permanent magnet.
A B
Figure 3.58
Student’s Book Form Two
25/10/2025 10:27