Annual Examinations For Secondary Schools Physics Worksheet - 2012 Page 11
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12b.
Name two advantages of using a temperature sensor rather than a glass thermometer.
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(2)
c.
It was observed that after some more time, the temperature of both beakers did not change any
more. Explain why.
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(2)
o
o
d.
The temperature of 0.5 kg of water changes from 70
C to 65
C. Given that the specific heat
o
capacity of water is 4200 J/kg
C, calculate:
i.
the change in temperature
________________________
(1)
ii.
the quantity of heat lost during this change.
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________________________________________________________________________________
(3)
12.
This question is about the magnetic effect of current flowing through a solenoid.
a.
Robert and Sharon set up an experiment to
investigate how the strength of the magnetic
Ammeter
Ammeter
field varies with the number of turns of wire
A
A
of an iron-core solenoid.
solenoid
solenoid
Soft iron
Soft iron
core
core
Variable
Variable
resistor
resistor
Iron pins
Iron pieces
Iron pieces
i.
Put the following statements in order. The first one is done for you.
The apparatus was set up as shown in the above diagram
1
Experiment was repeated with more turns of wire
The number of pins attracted was counted
The number of turns of wire were counted
A graph was plotted of number of turns of coil against number of pins attracted
The switch was closed
(5)
ii.
Name one physical quantity which must be kept constant during this investigation.
________________________________________________________________________________
(2)
Physics – Secondary Schools - Track 2 – Form 5 – 2012
Page 11 of 12
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