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IB14 06_9702_12/4RP
© UCLES 2014
[Turn over
*3571683968*
Cambridge International Examinations
Cambridge International Advanced Subsidiary and Advanced Level
PHYSICS
9702/12
Paper 1
Multiple Choice
May/June 2014
1 hour
Additional Materials:
Multiple Choice Answer Sheet
Soft clean eraser
Soft pencil (type B or HB is recommended)
READ THESE INSTRUCTIONS FIRST
Write in soft pencil.
Do not use staples, paper clips, glue or correction fluid.
Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided
unless this has been done for you.
DO
NOT
WRITE IN ANY BARCODES.
There are
forty
questions on this paper. Answer
all
questions. For each question there are four possible
answers
A
,
B
,
C
and
D
.
Choose the
one
you consider correct and record your choice in
soft pencil
on the separate Answer Sheet.
Read the instructions on the Answer Sheet very carefully.
Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any working should be done in this booklet.
Electronic calculators may be used.
PMT
2
© UCLES 2014
9702/12/M/J/14
Data
speed of light in free space,
c
= 3.00
×
10
8
m
s
–1
permeability of free space,
µ
0
= 4
π
×
10
–7
H
m
–1
permittivity of free space,
ε
0
= 8.85
×
10
–12
F
m
–1
(
0
4
1
ε
π
= 8.99
×
10
9
m
F
–1
)
elementary charge,
e
= 1.60
×
10
–19
C
the Planck constant,
h
= 6.63
×
10
–34
J
s
unified atomic mass constant,
u
= 1.66
×
10
–27
kg
rest mass of electron,
m
e
= 9.11
×
10
–31
kg
rest mass of proton,
m
p
= 1.67
×
10
–27
kg
molar gas constant,
R
= 8.31
J
K
–1
mol
–1
the Avogadro constant,
N
A
= 6.02
×
10
23
mol
–1
the Boltzmann constant,
k
= 1.38
×
10
–23
J
K
–1
gravitational constant,
G
= 6.67
×
10
–11
N
m
2
kg
–2
acceleration of free fall,
g
= 9.81
m
s
–2
PMT
3
© UCLES 2014
9702/12/M/J/14
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Formulae
uniformly accelerated motion,
s
=
ut
+
2
2
1
at
v
2
=
u
2
+ 2
as
work done on/by a gas,
W
=
p
∆
V
gravitational potential,
φ
= –
r
Gm
hydrostatic pressure,
p
=
ρ
gh
pressure of an ideal gas,
p
=
V
Nm
3
1
<
c
2
>
simple harmonic motion,
a
= –
ω
2
x
velocity of particle in s.h.m.,
v
=
v
0
cos
ω
t
v
=
±
ω
)
(
2
2
0
x
x

electric potential,
V
=
r
Q
0
4
ε
π
capacitors in series,
1
/
C
= 1
/
C
1
+ 1
/
C
2
+ . . .
capacitors in parallel,
C
=
C
1
+
C
2
+ . . .
energy of charged capacitor,
W
=
QV
2
1
resistors in series,
R
=
R
1
+
R
2
+ . . .
resistors in parallel,
1
/
R
= 1
/
R
1
+ 1
/
R
2
+ . . .
alternating current/voltage,
x
=
x
0
sin
ω
t
radioactive decay,
x
=
x
0
exp(–
λ
t
)
decay constant,
λ
=
2
1
0.693
t
PMT
4
© UCLES 2014
9702/12/M/J/14
1
The maximum theoretical power
P
of a wind turbine is given by the equation
P
=
k
ρ
Av
n
where
ρ
is the density of air,
A
is the area swept by the turbine blades,
v
is the speed of the air
and
k
is a constant with no units.
What is the value of
n
?
A
1
B
2
C
3
D
4
2
What is the unit of resistance when expressed in S
I
base units?
A
kg
m
2
s
–2
A
–1
B
kg
m
2
s
–3
A
–2
C
kg
m
s
–2
A
–1
D
kg
m
s
–3
A
–1
Space for working
PMT
5
© UCLES 2014
9702/12/M/J/14
[Turn over
3
A cathoderay oscilloscope (c.r.o.) is connected to an alternating voltage. The following trace is
produced on the screen.
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