A student investigated how the current in a filament lamp varied with the potential
difference across the filament lamp.
Figure 1 shows part of the circuit used.
Figure 1
0 1 . 1 Complete Figure 1 by adding an ammete
...
A student investigated how the current in a filament lamp varied with the potential
difference across the filament lamp.
Figure 1 shows part of the circuit used.
Figure 1
0 1 . 1 Complete Figure 1 by adding an ammeter and a voltmeter.
Use the correct circuit symbols.
[3 marks]
Question 1 continues on the next page4
*04* IB/H/Jun20/8463/1H
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outside the
Figure 2 shows some of the results. box
Figure 2
0 1 . 2 The student reversed the connections to the power supply and obtained negative
values for the current and potential difference.
Draw a line on Figure 2 to show the relationship between the negative values of
current and potential difference.
[2 marks]5
*05*
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0 1 . 3 Write down the equation which links current (I), potential difference (V) and
resistance (R).
[1 mark]
0 1 . 4 Determine the resistance of the filament lamp when the potential difference across it
is 1.0 V.
Use data from Figure 2.
[4 marks]
Resistance = Ω
0 1 . 5 A second student did the same investigation. The ammeter used had a zero error.
What is meant by a zero error?
[1 mark]
Turn over for the next question6
*06* IB/H/Jun20/8463/1H
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0 2 Figure 3 shows an LED torch. box
Figure 3
0 2 . 1 The torch contains one LED, one switch and three cells.
Which diagram shows the correct circuit for the torch?
[1 mark]
Tick () one box.7
*07*
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0 2 . 2 Write down the equation which links charge flow (Q), current (I) and time (t). box
[1 mark]
0 2 . 3 The torch worked for 14 400 seconds before the cells needed replacing.
The current in the LED was 50 mA.
Calculate the total charge flow through the cells.
[3 marks]
Total charge flow = C
0 2 . 4 When replaced, the cells were put into the torch the wrong way around.
Explain why the torch did not work.
[2 marks]
Question 2 continues on the next page8
*08* IB/H/Jun20/8463/1H
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0 2 . 5 Write down the equation which links efficiency, total power input and useful power
output.
[1 mark
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