Physics Worksheet - Annual Examinations For Secondary Schools, 2015 Page 10
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12b) Figure 14 below represents a d.c. motor.
B
C
N
S
D
A
+
−
Figure 14
i) Draw the direction of the current in coil sections AB and CD.
[2]
ii) Coil section _____ experiences a force pushing it out of the page when the electric current
flows through the coil.
[2]
iii) Which section of the coil does NOT experience a force? Give a reason for your answer.
_______________________________________________________________________________
____________________________________________________________________________ [3]
iv) Underline one of the statements below that best describes the motion of coil ABCD:
1. It will move out of the paper.
2. It will move into the paper.
3. It will rotate.
[1]
v) Name an appliance which makes use of an electric motor.
____________________________________________________________________________ [1]
12. This question is about measuring the specific heat capacity of sea water.
Nadia and Joanne want to find the specific heat capacity of some sea water taken from Golden Bay.
They have the following apparatus:
beaker containing some sea water; d.c. heater; d.c. power supply; electronic balance;
joulemeter; thermometer; lagging material; lid; stirrer,
a) Complete the diagram of the apparatus used in the experiment by adding the missing apparatus
and labels.
[4]
Physics – Form 5 Secondary – Track 2 – 2015
Page 10 of 12
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