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Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
PHYSICS Paper 4 A Level Structured Questions
Candidates answer on the Question Paper. No Additional Materials are required.
9702/41 October/November 2017
2 hours
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES.
Answer all questions.
Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units.
At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.
DC (JP) 154384 ? UCLES 2017
This document consists of 23 printed pages and 1 blank page.
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Data speed of light in free space permeability of free space permittivity of free space
elementary charge the Planck constant unified atomic mass unit rest mass of electron rest mass of proton molar gas constant the Avogadro constant the Boltzmann constant gravitational constant acceleration of free fall
2
c = 3.00 ? 108 m s-1
0 = 4 ? 10-7 H m-1
0 = 8.85 ? 10-12 F m-1
(
1
40
= 8.99 ? 109 m F-1)
e = 1.60 ? 10-19 C
h = 6.63 ? 10-34 J s
1 u = 1.66 ? 10-27 kg
me = 9.11 ? 10-31 kg mp = 1.67 ? 10-27 kg
R = 8.31 J K-1 mol-1
NA = 6.02 ? 1023 mol-1 k = 1.38 ? 10-23 J K-1
G = 6.67 ? 10-11 N m2 kg-2
g = 9.81 m s-2
? UCLES 2017
9702/41/O/N/17
Formulae uniformly accelerated motion
work done on/by a gas gravitational potential hydrostatic pressure pressure of an ideal gas simple harmonic motion velocity of particle in s.h.m.
Doppler effect
electric potential capacitors in series capacitors in parallel energy of charged capacitor electric current resistors in series resistors in parallel Hall voltage alternating current/voltage radioactive decay decay constant
3
s
=
ut
+
1 2
at
2
v 2 = u 2 + 2as
W = pV
=
-
Gm r
p = gh
p
=
1 3
Nm V
c 2
a = - 2x
v = v0 cos t
v = ? (x02?x2)
fo
=
fsv v ? vs
V
=
Q
40r
1/C = 1/C1 + 1/C2 + . . .
C = C1 + C2 + . . .
W
=
1 2
QV
I = Anvq
R = R1 + R2 + . . .
1/R = 1/R1 + 1/R2 + . . .
VH
=
BI ntq
x = x0 sin t
x = x0 exp(-t )
=
0.693 t1
2
? UCLES 2017
9702/41/O/N/17
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4 Answer all the questions in the spaces provided.
1 (a) State (i) what may be deduced from the difference in the temperatures of two objects, ........................................................................................................................................... ..................................................................................................................................... [1] (ii) the basic principle by which temperature is measured. ........................................................................................................................................... ..................................................................................................................................... [1]
(b) By reference to your answer in (a)(ii), explain why two thermometers may not give the same temperature reading for an object. ................................................................................................................................................... ................................................................................................................................................... ............................................................................................................................................. [2]
(c) A block of aluminium of mass 670 g is heated at a constant rate of 95 W for 6.0 minutes. The specific heat capacity of aluminium is 910 J kg-1 K-1. The initial temperature of the block is 24 ?C. (i) Assuming that no thermal energy is lost to the surroundings, show that the final temperature of the block is 80 ?C.
[3]
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9702/41/O/N/17
5
(ii) In practice, there are energy losses to the surroundings. The actual variation with time t of the temperature of the block is shown in Fig. 1.1.
100
80 / ?C
60
40
20
0
0
1
2
3
4
5
6
t / minutes
Fig. 1.1
1. Use the information in (i) to draw, on Fig. 1.1, a line to represent the temperature of
the block, assuming no energy losses to the surroundings.
[1]
2. Using Fig. 1.1, calculate the total energy loss to the surroundings during the heating process.
? UCLES 2017
energy loss = ...................................................... J [2] [Total: 10]
9702/41/O/N/17
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