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Paper 1 Multiple Choice Question AS Level Physics
1
What is approximate range of wavelengths in free space for infrared radiation?
A 100 nm to 400 nm
B 300 μm to 30 cm
C 400 nm to 700 nm
D 800 nm to 1000 μm
2
A progressive wave of frequency 300 Hz is travelling with a speed of 600 m s-1.
What is the phase difference between two points on the wave that are a distance of 0.50 m
apart?
A 450
B 900
C
1800
D 3600
3
The diagram shows a car travelling at a constant speed in a straight line between person P
and person Q from point X to point Y.
The car sounds its horn continuously as it travels. The horn emits sound of constant
frequency. Which statement about what person P and person Q hear during the motion of
the car are correct?
1. Person P hears a sound of increasing frequency.
2. Person Q hears a sound of decreasing frequency.
3. Person Q always hears a sound of higher frequency that person P.
A
4
1, 2 and 3
B
1 and 2 only
C
3 only
D
none of them
A beam of light from a laser is incident normally on a diffraction grating.
The diagram shows only the second-order maxima that are produced. The grating has a
line spacing of 1.0 × 10−6 m. The angle between the two second-order maxima is 110.
What is the wavelength of the light?
A 4.1 × 10−7 m
B 4.7 × 10−7 m
C 8.2 × 10−7 m
D 9.4 × 10−7 m
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5
A horizontal glass tube, closed at one end, has a layer of dust laid inside it on its lower side.
Sound is emitted from a loudspeaker that is placed near the open end of the tube.
The frequency of the sound is varied and, at one frequency, a stationary wave is formed
inside the tube so that the dust forms small heaps.
The distance between four heaps of dust is 30 cm.
The speed of sound in the air in the tube is 330 m s-1.
What is the frequency of the sound emitted by the loudspeaker?
A 1650 Hz
B 2200 Hz
C 3300 Hz
D 6600 Hz
6
A metal wire is connected between the terminals of a cell so that there is a current in the
wire. Which statement is correct?
A Negatively charged electrons in the wire move from the negative terminal to the
positive terminal.
B Negatively charged nuclei in the wire move from the negative terminal to the positive
terminal.
C Positively charged electrons in the wire move from the positive terminal to the negative
terminal.
D Positively charged nuclei in the wire move from the positive terminal to the negative
terminal.
7
A cell of negligible internal resistance is connected in series with a thermistor, a fixed
resistor and an ammeter.
The thermistor is placed in a beaker of water and the temperature of the water is slowly
increased.
A graph of current I against the temperature T of the thermistor is plotted.
Which graph could show the variation of I with T ?
8
A piece of conducting putty is in the shape of a cylinder of length 60 mm and diameter 20
mm. The resistance between the ends of the cylinder is 20 Ω.
What is the resistivity of the putty?
A 0.033 Ω m
B 0.10 Ω m
C 0.42 Ω m
D 5.2 Ω m
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9
The diagram shows a potentiometer circuit used to compare the electromotive forces
(e.m.f.), E1 and E2, of two cells. XY is a uniform resistance wire. The fixed resistor has
resistance R. A sliding contact is moved along the wire XY. When the sliding contact is at
position P, the galvanometer reads zero.
The circuit is changed so that the galvanometer reads zero when the sliding contact is at a
new position to the left of P.
Which change could have been made to the circuit?
A The wire XY was replaced with one of lower resistance.
B E2 was increased.
C E1 was decreased.
D R was decreased.
10
A battery of electromotive force (e.m.f.) 12 V and negligible internal resistance is connected
to a fixed resistor of resistance 40  and a thermistor of resistance RT, as shown.
Initially, the temperature of the thermistor is 15 C and the current in the circuit is 0.10 A.
The temperature of the thermistor then changes, which causes the current to increase to
0.12 A.
How does the temperature of the thermistor change and what is RT at the new temperature?
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2
3
11
Which flavours of quark have charge + 𝑒 ?
12
What is a general description of a baryon?
A It consists of three quarks that must all be the same flavour
B It consists of three quarks that do not need to be the same flavour
C It consists of two quarks that must both be the same flavour
D It consists of two quarks that do not need to be the same flavour
13
What is the change to the quark composition of a nucleus that takes place during β+ decay?
A down to anti-up
B down to up
C up to anti-down
D up to down
14
Which statement about radioactive decay is correct?
A Neutrinos are always emitted during -decay.
B The -particles emitted from a radioactive sample have a continuous range of kinetic
energies.
C The – particles emitted from a radioactive sample have a continuous range of kinetic
energies.
D The proton number of a nucleus decreases by four when it undergoes -decay.
15
An unstable nucleus of an element decays by emitting an -particle or a – particle to
become a nucleus of a different element. This nucleus is also unstable and emits an particle or a – particle. The process continues until an isotope of the original element is
produced.
What is the minimum possible number of these particles emitted?
A 2
B 3
C
4
16
D
5
A uranium nucleus has 92 protons and 143 neutrons.
The nucleus emits a total of 3 -particles and 4 – particles to form nucleus X.
How can nucleus X be represented?
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Nucleus P has 144 neutrons and 93 protons. Nucleus P is unstable and undergoes -decay
to form nucleus Q. Nucleus Q then undergoes – decay to form nucleus R.
Nucleus P is represented by point P on the graph.
Which point on the graph represents nucleus R?
18
The diagrams show the quark composition of four different hadrons. One of the hadrons is
a Σ + particle. It has a charge of +𝑒, where 𝑒 is the elementary charge.
Which hadron could be the Σ+ particle?
19
A neutron 10n is fired at a 235
92U nucleus. The neutron is absorbed by the nucleus which then
92
splits to form nuclei of 141
Ba
and 36
Kr.
56
What is the number of free neutrons emitted when the 235
92U nucleus splits?
A 0
B 1
C
2
D 3
20
When a sample of a radioactive isotope decays by -particle emission, the -particles
emitted have a single discrete energy.
When a sample of a radioactive isotope decays by – particle emission, the – particles
emitted have a continuous range of energies.
What is the explanation for this?
A
B
C
D
An antineutrino is emitted with a – particle but not with an -particle.
An antineutrino is emitted with an -particle but not with a – particle.
The -particles have much more energy than the – particles.
The – particles have much more energy than the -particles.
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Paper 2 Structured Question AS Level Physics
1
Two progressive sound waves Y and Z meet at a fixed point P. The variation with time t of
the displacement x of each wave at point P is shown in Fig. 1.1.
(a)
(b)
(c)
Fig. 1.1
Use Fig. 1.1 to state one quantity of waves Y and Z that is:
(i)
the same
………………………………………………………………………………………….
(ii) different
………………………………………………………………………………………….
State and explain whether waves Y and Z are coherent.
………………………………………………………………………………………………...
………………………………………………………………………………………………...
[1]
[1]
The two waves superpose at P.
Use Fig. 1.1 to determine the resultant displacement at time t = 0.75 ms.
resultant displacement = ................................................... μm
(e)
[1]
Determine the phase difference between the waves.
phase difference = ....................................................... °
(d)
[1]
[1]
The intensity of wave Y at point P is I.
Determine, in terms of I, the intensity of wave Z.
intensity = .........................................................
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(f)
The speed of wave Z is 330 m s-1.
Determine the wavelength of wave Z.
wavelength = ..................................................... m
Total:
2
[3]
[10]
A train travels at a constant high speed along a straight horizontal track towards an
observer standing adjacent to the track, as shown in Fig. 2.1.
Fig. 2.1
The train sounds its horn continuously as it approaches the observer, from time t = 0 until
it is well past the observer at time t = t2. The train passes the observer at time t = t1.
The horn emits a sound wave of constant frequency fS
(a) On Fig. 2.2, sketch the variation of the frequency of sound heard by the observer
with time t, from time t = 0 to t = t2.
(b)
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(a)
Fig. 2.2
At a particular time, the sound waves at the observer have an intensity of 4.7 × 10−3
W m-2. The waves at the observer are incident at right angles on a circular detector
of radius 2.8 cm.
Calculate the power P of the waves incident on the detector.
[1]
P = ..................................................... W
Total:
[3]
[4]
Metal wire is used to connect a power supply to a lamp. The wire has a total
resistance of 3.4 Ω and the metal has a resistivity of 2.6 × 10−8 Ω m. The total length
of the wire is 59 m.
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(i)
Show that the wire has a cross-sectional area of 4.5 × 10−7 m2.
(ii)
The potential difference across the total length of wire is 1.8 V.
Calculate the current in the wire.
[2]
current = ...................................................... A
(iii)
The number density of the free electrons in the wire is 6.1 × 1028 m−3.
Calculate the average drift speed of the free electrons in the wire.
average drift speed = ................................................ m s-1
(b)
(ii)
(a)
[2]
A different wire carries a current. This wire has a part that is thinner than the rest of
the wire, as shown in Fig. 3.1.
(i)
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[1]
(i)
(ii)
Fig. 3.1
State and explain qualitatively how the average drift speed of the free electrons
in the thinner part compares with that in the rest of the wire.
………………………………………………………………………………………….
………………………………………………………………………………………….
………………………………………………………………………………………….
[2]
State and explain whether the power dissipated in the thinner part is the same,
less or more than the power dissipated in an equal length of the rest of the wire.
………………………………………………………………………………………….
………………………………………………………………………………………….
………………………………………………………………………………………….
Total:
[2]
[9]
State Kirchhoff’s first law.
………………………………………………………………………………………….
………………………………………………………………………………………….
[1]
Kirchhoff’s first law is linked to the conservation of a certain quantity. State this
quantity.
………………………………………………………………………………………….
[1]
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(b)
A battery of electromotive force (e.m.f.) 8.0 V and internal resistance 2.0 Ω is
connected to a resistor X and a wire Y, as shown in Fig. 4.1.
Fig. 4.1
The resistance of X is 15 Ω. The resistance of Y is 𝑅𝑌 .
The current in the battery is 2.5 A.
(i)
Calculate
1.
the thermal energy dissipated in the battery in a time of 5.0 minutes,
energy = ........................................................J
2.
the terminal potential difference of the battery.
terminal potential difference = ....................................................... V
(ii)
[1]
Determine the resistance 𝑅𝑌 .
𝑅𝑌 = .......................................................Ω
(iii)
[2]
A new wire Z has the same length but less resistance than wire Y.
1.
State two possible differences between wire Z and wire Y that would
separately cause wire Z to have less resistance than wire Y.
first difference: …………………………………………………………………
second difference: …………………………………………………………….
2.
Wire Y is replaced in the circuit by wire Z. By considering the current in
the battery, state and explain the effect of changing the wires on the total
power produced by the battery.
……………………………………………………………………………………
……………………………………………………………………………………
Total:
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[3]
[2]
[2]
[12]
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