UNIVERSITY OF CAMBRIDGE INTERNATIONAL ... Level/Physics (9702)/9702_s13...UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level
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4 A student carried out an experiment in which an electric current was known to decrease with time. The readings he found, from first to last, were 3.62 mA, 2.81 mA, 1.13 mA, 1.76 mA and 0.90 mA.
Which statement could not explain the anomalous 1.13 mA reading?
A He has reversed the third and fourth readings in the results table.
B He read the ammeter incorrectly; the reading should have been 2.13 mA.
C He took the current reading at the wrong time.
D There was a systematic error in the readings from the ammeter. 5 The diagram shows a calibration curve for a thermistor, drawn with an unusual scale on the
vertical axis.
0 10 20 temperature / °C30 40 50
100 000
10 000
1000
100
resistance / Ω
What is the thermistor resistance corresponding to a temperature of 40 °C?
6 A sky diver falls vertically from a stationary balloon. She leaves the balloon at time t = 0. At time t = T, she reaches terminal velocity. Beyond the time shown in the graphs, she opens her parachute.
Which graph shows the variation with time t of the force F due to air resistance?
F
tT0
0
A
F
t0
0
B
F
t0
0
C
F
t0
0
D
T T T 7 The diagram shows an arrangement to stop trains that are travelling too fast.
train
speed 50 m s–1
maximum speed10 m s–1
directionof travel
marker 1 marker 2
Trains coming from the left travel at a speed of 50 m s–1. At marker 1, the driver must apply the brakes so that the train decelerates uniformly in order to pass marker 2 at no more than 10 m s
–1.
The train carries a detector that notes the times when the train passes each marker and will apply an emergency brake if the time between passing marker 1 and marker 2 is less than 20 s.
14 A uniform beam of mass 1.4 kg is pivoted at P as shown. The beam has a length of 0.60 m and P is 0.20 m from one end. Loads of 3.0 kg and 6.0 kg are suspended 0.35 m and 0.15 m from the pivot as shown.
0.15 m0.35 m
3.0 kg 6.0 kg
0.20 m0.40 m
centre of beamof mass 1.4 kg
P
What torque must be applied to the beam in order to maintain it in equilibrium?
A 0.010 N m B 0.10 N m C 0.29 N m D 2.8 N m 15 A ball is thrown vertically upwards.
Neglecting air resistance, which statement is correct?
A The kinetic energy of the ball is greatest at the greatest height attained.
B By the principle of conservation of energy, the total energy of the ball is constant throughout its motion.
C By the principle of conservation of momentum, the momentum of the ball is constant throughout its motion.
D The potential energy of the ball increases uniformly with time during its ascent. 16 A bow of mass 400 g shoots an arrow of mass 120 g vertically upwards. The potential energy
stored in the bow just before release is 80 J. The system has an efficiency of 28%.
What is the height reached by the arrow when air resistance is neglected?
17 A train on a mountain railway is carrying 200 people of average mass 70 kg up a slope at an
angle of 30° to the horizontal and at a speed of 6.0 m s–1. The train itself has a mass of 80 000 kg. The percentage of the power from the engine which is used to raise the passengers and the train is 40 %.
What is the power of the engine?
A 1.1 MW B 2.8 MW C 6.9 MW D 14 MW 18 A gas is enclosed inside a cylinder which is fitted with a frictionless piston.
gas
V1
V2
p p
heat
Initially, the gas has a volume V1 and is in equilibrium with an external pressure p. The gas is then heated slowly so that it expands, pushing the piston back until the volume of the gas has increased to V2.
How much work is done by the gas during this expansion?
23 The diagram shows a large crane on a construction site lifting a cube-shaped load.
cablecrane
load
A model is made of the crane, its load and the cable supporting the load.
The material used for each part of the model is the same as that in the full-size crane, cable and load. The model is one tenth full-size in all linear dimensions.
What is the ratio crane model the on cable the in stress
crane sizefull the on cable the in stress -
?
A 100 B 101 C 102 D 103 24 The order of magnitude of the frequency of the shortest wavelength of visible light waves can be
29 Monochromatic light of wavelength 5.30 × 10–7 m is incident normally on a diffraction grating. The
first order maximum is observed at an angle of 15.4° to the direction of the incident light.
What is the angle between the first and second order diffraction maxima?
A 7.6° B 15.4° C 16.7° D 32.0°
30 Two conducting layers of a liquid crystal display of a calculator are 8 µm apart. A 1.5 V cell is connected across the conducting layers when the calculator is switched on.
What is the electric field strength between the layers?
36 A 12 V battery is in series with an ammeter, a 2 Ω fixed resistor and a 0 – 10 Ω variable resistor. High-resistance voltmeters P and Q are connected across the variable resistor and the fixed resistor respectively, as shown.
A
VV
QP
12 V
0 – 10 Ω2 Ω
The resistance of the variable resistor is changed from its maximum value to zero.
Which graph shows the variation with current of the voltmeter readings?
A 0.25 Ω B 0.61 Ω C 4.0 Ω D 16 Ω 38 In the circuit below, the reading VT on the voltmeter changes from high to low as the temperature
of the thermistor changes. The reading VL on the voltmeter changes from high to low as the level of light on the light-dependent resistor (LDR) changes.
VT VL VV
The readings VT and VL are both high.
What are the conditions of temperature and light level?
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