11 mark
A student measures the potential difference across a resistor as and the current in the resistor as .
Which value is the resistance of the resistor given to the same number of significant figures as the data?
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Handling Data (OCR A Level Physics): Exam Questions
Exam code: H556
39 mins16 questions
21 mark
A student investigates how the period T of a simple pendulum depends on its length l. The relationship between T and l is
where g is the acceleration of free fall.
The student plots a graph of T2 on the y-axis against l on the x-axis. The graph is a straight line through the origin.
Which expression is equal to the gradient of the graph?
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31 mark
A student plots a graph of their results. Each point on the graph has an error bar. The student draws a straight line of best fit, then draws a worst acceptable straight line to find the uncertainty in the gradient.
Which statement(s) about the worst acceptable line is/are correct?
It must pass through the origin
It passes through all of the error bars
It is either the steepest or the shallowest straight line that passes through all of the error bars
1, 2 and 3
Only 1 and 2
Only 2 and 3
Only 1
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11 mark
A solid cylindrical glass rod has length 20.0 ± 0.1 cm and diameter 5.00 ± 0.01 mm.
What is the percentage uncertainty in the calculated volume of this rod?
0.1 %
0.2 %
0.7 %
0.9 %
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21 mark
Which is the best value for the elementary charge e in terms of both accuracy and uncertainty?
(1.5 ± 0.5) × 10−19C
(1.5 ± 0.4) × 10−19C
(1.7 ± 0.2) × 10−19C
(1.8 ± 0.2) × 10−19C
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31 mark
The student measures the height of a tube. The student’s values are:
83.5cm 82.9cm 83.3cm 83.1cm
What is the average height h and the absolute uncertainty in h?
83.2 ± 0.3 cm
83.2 ± 0.1 cm
83.2 ± 0.5 cm
83.1 ± 0.3 cm
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41 mark
A student of mass 85.2 kg uses a set of weighing scales to measure his mass three times. The following readings are obtained.
| Mass / kg |
Reading 1 | 87.2 |
Reading 2 | 87.1 |
Reading 3 | 87.2 |
Which statement describes the precision and accuracy of the data?
not precise to ± 0.1 kg and accurate to ± 0.1 kg
not precise to ± 0.1 kg and not accurate to ± 0.1 kg
precise to ± 0.1 kg and accurate to ± 0.1 kg
precise to ± 0.1 kg and not accurate to ± 0.1 kg
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51 mark
A hard disk is labeled as having a storage capacity of 420 GB. The letter B stands for byte, which is a unit. What is the equivalent storage capacity in bytes?
4.20 x 108
4.20 x 1011
4.20 x 109
4.20 x 1017
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11 mark
Which is the best estimate of the area of a rectangular field of length 98 ± 3 m and width 47 ± 2 m?
4600 ± 5 m2
4600 ± 6 m2
4600 ± 300 m2
4606 ± 337 m2
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21 mark
The units for the gradient of a graph are kg m-1 s-2.
Which one of the following options is a possible graph with this gradient?
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31 mark
A voltmeter and an ammeter are used to determine the resistance of a resistor. The calculated resistance is 8.50 Ω ± 15 %. The ammeter reading is 2.35 A ± 6%.
What is the absolute uncertainty in the voltmeter reading?
± 0.09 V
± 1.28 V
± 1.80 V
± 2.19 V
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41 mark
A trolley is released from rest and it travels down a ramp. Its velocity is measured at 0.5 s intervals. The table of results are shown below, and a graph is plotted.
v / m s-1 | t / s |
0.620 | 0.5 |
1.99 | 1.0 |
3.00 | 1.5 |
3.98 | 2.0 |
4.99 | 2.5 |
Which statement is true?
There are no anomalies in the results
The area under the graph is 6.2 m (2 s.f)
The gradient of the graph is 1.7 m s-2 (2 s.f)
The graph will show an inversely proportional relationship between v and t
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