This document contains June 2022 OCR A Level Physics B (Advancing Physics) H557/03 Practical skills in physics Question Paper. Perfect for Revision.
SECTION A
Answer all the questions.
1 This question is about the polarisation of electromagnetic waves.
(a) Explain what is meant by the term polarisation and state why all electromagnetic waves can
be polarised.
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(b) A student looks at light reflected from a glass block through one polarising filter. Explain how
they could tell if the reflected light shows any polarisation.
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(c) Another student investigates the polarisation of microwaves using apparatus shown in
Fig. 1.1.
transmitter
metal grille
receiver
voltmeter
Fig. 1.1
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The grille starts in the vertical position as shown and is rotated. The intensity of the
microwaves at the receiver is measured at different angles.
(i) Describe how the angle of rotation could be measured in a school laboratory.
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(ii) The results from the investigation are plotted on the graph shown in Fig. 1.2. Use data
points from the graph below (excluding voltage = 0) to test whether the investigation
shows that
Intensity ∝ cos2θ
Make your conclusion clear.
0.0
0 50 100 150 200
angle θ / °
voltage /mV
250 300 350
1.0
2.0
3.0
4.0
Fig. 1.2
[3]
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2 This question is about an investigation into the relationship between the pressure and volume of
a gas. The relationship is often referred to as Boyle’s Law. A student set up the apparatus shown
in Fig. 2.1.
pressure gauge
reservoir of air
to air pump
oil
gas
height, h
Fig. 2.1
(a) (i) Identify a variable which needs to be controlled in the investigation.
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(ii) Before setting up the apparatus, the student took measurements with vernier calipers of
the internal diameter of the tube containing the gas. The student created the dot plot of
cross‑sectional area shown in Fig. 2.2.
Taking into consideration any outliers, calculate a value for the mean and percentage
uncertainty of the cross‑sectional area of the tube. Give your answers to an appropriate
number of significant figures.
79 80 81 82 83 84 85 86
cross-sectional area /mm2
87 88 89 90 91 92
Fig. 2.2
Mean cross‑sectional area = ............................. mm2 ± ............................. % [4]
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(iii) The height, h, of the column of air is measured using a standard laboratory metre rule.
Estimate the absolute uncertainty in the measurement and justify your answer.
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(b) The pressure gauge used in the experiment records excess pressure. The absolute pressure
of the gas is given by
absolute pressure = excess pressure + atmospheric pressure
When the pressure gauge reads 255kPa calculate the value for
1
absolute pressure and state
the unit.
Atmospheric pressure = 101kPa.
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absolute pressure = ................................... unit ............... [2]
Version | LATEST 2022 |
Release date | 2022-07-16 |
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Authors | Qwivy.com |
Pages | 20 |
Language | English |
Tags | OCR A LEVEL PHYSICS B Advancing Physics H557/03 Practical skills in physics OCR OCR A LEVEL PHYSICS PHYSICS B A LEVEL PHYSICS |
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