Download SCIENCE (PHYSICS, CHEMISTRY) Additional materials: Answer

O
level
FIS Education Centre
Preliminary Examination 4
For General Certificate of Education Ordinary Level of
University of Cambridge Local Examinations Syndicate
SCIENCE (PHYSICS, CHEMISTRY)
PAPER 2 PHYSICS
5116/02
October/November 2009
Additional materials: Answer paper
1 hour 15 minutes
INSTRUCTIONS TO CANDIDATES
Write your name, candidate number in the spaces at the top of this page and on any separate
answer paper used.
Section A
Answer all questions.
Write your answers in the spaces provided on the question paper.
Section B
Answer any two questions.
Write your answers on the lined pages provided and, if necessary, continue on separate
answer paper.
At the end of the examination
1. fasten any separate answer paper used securely to the question paper.
2. enter the numbers of the Section B questions you have answered in the grid below.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each of
question or part question.
FOR EXAMINER’S USE
Section A
Section B
TOTAL
This document consists of 8 printed pages.
Section A
Answer all questions in the spaces provided.
1. Figure below shows the velocity of a bus moving along a straight road over
a period of time.
Velocity/ms-1
30
20
10
0
20
40
60
80
120
100
Time/s
(a) Describe how the speed of the car changed.
___________________________________________________________
___________________________________________________________
_________________________________________________________[2]
(b) Describe how the acceleration of the car changed.
___________________________________________________________
___________________________________________________________
_________________________________________________________[2]
(c) What is the total distance travelled by the car in 120s?
The distance=_____ [3]
2. A uniform rod is as shown on the graph below, ignoring the mass of the
rod.
If we put an unknown object on the right end, there must be a 2N force
exerting on the left end to make the rod balanced in horizontal position.
Then we put the same unknown object on the left end of the rod, there
must be an 8N force exerting on the right end to balance the rod in
horizontal position. Take the gravitational field strength is 10N/kg, what is
the mass of the unknown object?
2N
Unknown mass object
Unknown mass object
8N
Mass=____kg [3]
3. Figure below shows three containers of different base areas and they
contain the same depth of water.
A
B
C
(a) Define the term ‘pressure’.
___________________________________________________________
________________________________________________________ [2]
(b) Which of the three containers is exerted the biggest pressure by the
water on the bottom of the cup? Explain your answers.
___________________________________________________________
___________________________________________________________
_________________________________________________________[3]
(c) If the depth of water is 20cm, and the density of water is 1×103 kg/m3.
Calculate the pressure exerted at the base of A.
Pressure=_____ [3]
4. The diagram below represents the range of
radiations in the
electromagnetic spectrum.
microwa
Gamma
ve
rays
(a) Fill in the spaces with the names of the waves in the electromagnetic
spectrum.
[3]
(b) Write down three common properties of electromagnetic waves.
___________________________________________________________
___________________________________________________________
________________________________________________________ [3]
(c) Give one use of microwaves.
___________________________________________________________
________________________________________________________ [1]
5. Figure below shows an object placed in front of a converging lens of focal
length f.
Lens
object
f
f
(a) On the figure above, sketch a ray diagram to show how the image was
formed by the lens. Use a line to represent the light ray, a dashed line to
represents the produce line and use a line with an arrow to show the image
formed.
[2]
(b) State three properties of the image formed by the lens
___________________________________________________________
________________________________________________________ [3]
(c) Name an optical instrument that uses this arrangement of lens and
object.
________________________________________________________ [1]
6. (a) State the main differences of the magnetic properties between soft iron
and steel.
___________________________________________________________
________________________________________________________ [2]
(b) Give one usage due to their magnetic properties for each substance.
___________________________________________________________
________________________________________________________ [2]
7. In a circuit, resistors R 1 and R 2 with resistances 4.0Ω and 12Ω are
connected in series, while resistor R 3 with resistance 4.0Ω is connected in
parallel with them. Assuming the current flow through R 3 is 1.0A.
(a) Calculate the combined resistance of R 1 , R 2 , and R 3 .
Combined resistance =_____ [4]
(b) Calculate the current flowing through R 1 and R 2.
I 1 =____
I 2 =____ [3]
(c) Calculate the potential difference across the resistance R 1 .
U 1 =___ [2]
8. Two conducting balls of the same mass are suspended on nylon threads,
and they come to rest with the threads making equal angles to the vertical as
shown in figure below.
(a) If one of the balls is negative charged, what‘s the other ball charged?
Explain why.
___________________________________________________________
________________________________________________________ [2]
(b) On the diagram draw lines to show the force they exerted, and use an
arrow to show the direction of the force.
[1]
Section B
Answer any two questions
Write your answers on the separate answer paper provided.
9. A tank of water is kept warm by an electric heater placed on the middle of
the metal tank as shown on the figure below.
(a) Describe two ways by which the heater warms all the water in the tank.
[2]
(b) Sketch an aid and describe an experiment to demonstrate a convection
current in a liquid.
[4]
(c) When the water cools down and the heater is switched off, state two
ways the water cools down.
[2]
(d) Which wire the fuse should be positioned on? And explain why the
metal body has to be earthed.
[2]
10. (a) With the aid of a diagram, describe an experiment to show that sound
need a medium to transmit.
[4]
(b) What is the pitch of a sound means? Explain what influences the pitch
of a sound.
[2]
(c) What is the loudness of a sound means? Explain what influences the
loudness of a sound.
[2]
(d) State the difference between transverse waves and the longitudinal
waves. And give an example for each.
[2]
11. (a) What is the magnetic field means?
[1]
(b) What is the electric field means?
[1]
(c) Draw the magnetic field lines around a bar magnet.
[2]
(d) Draw the electric field lines around a positive electron and a negative
electron.
[2]
(e) With the aid of a diagram, explain how an electric current is used to
demagnetize a magnet.
[4]