Physical Science Multiple Choice Quiz Worksheet Page 14
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1614
7.
An investigation into the relationship of potential difference and current through a
resistor, R, is conducted. Some of the pieces of apparatus connected in a circuit
are listed:
List: conductors, four identical cells, a switch, a rheostat, resistor R.
(a) Name two important pieces of apparatus which are not in the list.
[2]
(b) Parts of the circuit diagram are shown. Copy and complete the circuit
diagram for this investigation.
[4]
(c) The table shows the results obtained.
Potential difference / V
0
1
2
3
4
5
Current / A
0.00
0.34
0.60
0.80
0.98
1.08
Potential difference ÷
-
2.94
U1
U2
4.08
4.63
Current / V/A
(i)
Calculate the values for U1 and U2.
[2]
(ii)
Write down the unit for resistance.
[1]
(d) The investigation is repeated with resistor R submerged in water and the
results are recorded:
Potential difference / V
0
1
2
3
4
5
Current / A
0.00
0.44
0.90
1.34
1.76
2.26
Potential difference ÷
-
2.27
2.22
2.24
2.27
2.21
Current / V/A
(i)
Compare the results obtained in (c) and (d).
[2]
(ii)
Draw a sketch-graph of current on the y-axis and potential difference
on the x-axis for the results in (d).
[3]
[14]
JSC 2007, Physical Science
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