assessment chapter
TRANSCRIPT
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Assessment chapter 1
1. Which of the following is a base SI
quantity?
A Weight B Energy
C Velocity D Mass
2. Which of the following is a derived
quantity?
A Length B Mass
C Temperature D Voltage
3. Which of the following is not a
basic unit?
A Newton B kilogram
C ampere D second
4. Which of the following quantities
cannot be derived?
A Electric current B Power
C Momentum D Force
5. Which of the following quantities is
not derived from the basic physical
quantity of length?
A Electric charge B Density
C Velocity D Volume
6. Initial velocity u, final velocity v,
time t and another physical quantity k
is related by the equation v - u = kt.
The unit for k is
A m s-1 B m-1 s
C m s-2 D m2 s-2
7. Which of the following has the
smallest magnitude?
A megametre B centimeter C kilometre D mikrometre
8. 4 328 000 000 mm in standard form is
A 4.328 x 10-9 m
B 4.328 x 10-6 m
C 4.328 x 106 m
D 4.328 x 109 m
9. Which of the following measurements
is the longest?
A 1.2 x 10-5
cmB 120 x 10-4 dm
C 0.12 mm
D 1.2 x 10-11 km
10. The diameter of a particle is 250 m.What is its diameter in cm?
A 2.5 x 10-2 B 2.5 x 10-4
C 2.5 x 10-6 D 2.5 x 10-8
11. Which of the following prefixes is
arranged in ascending order?
A mili, senti, mikro, desi
B mikro, mili, senti,
desi
C mili, mikro, desi, senti
D desi, mikro, mili,senti
12. Velocity, density, force and energy
are
A basic quantities
B scalar quantities
C derived quantities
D vector quantities
13. Which of the following shows thecorrect conversion of units?
A 24 mm3 =2.4 x 10-6 m3B
300 mm3=3.0 x 10-7 m3
C 800 mm3=8.0 x 10-2 m3
D 1 000 mm3=1.0 x 10-4 m3
14. Which of the following measurements
is the shortest ?
A 3.45 x 103 m
B 3.45 x 104 cm
C 3.45 x 107
mmD 3.45 x 1012 m
15. The Hitz FM channel broadcasts radio
waves at a frequency of 92.8 MHz in
the north region. What is the frequency
of the radio wave in Hz?
A 9.28 x 104 B 9.28 x 105
C 9.28 x 107 D 9.28 x 1010
16. An object moves along a straight line
for time, t. The length of the line, s is
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given by the equation2
2
1gts = . The
SI unit of g is
A m2 s2 B m s-2
C s-1 D s-2 m
Part B : Structure Question
1. A car moves with an average speed of 75 km h-1 from town P to town Qin 2 hours as shown in Figure 1. By using this information, you maycalculate the distance between the two towns.
P Q
Figure 1(a) (i) Based on the statements given, state two basic quantities and
their respectiveSI units.
(ii) State a derived quantity and its SI unit.
(b)Convert the value 1 . m to standard form.5 x 10-3
(c) Complete Table 1 by writing the value of each givenprefix.
Table 1(d)Power is defined as the rate of change of work done. Derive the unit
for power in terms of its basic units.
(e) Calculate the volume of a wooden block with dimension of 7 cm, 5cm breadth and 12 cm height in m3 and convert its value instandard form.
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2. Figure 2 shows an ammeter of 03 A range.
Figure 2
(a)(i) Name component X....
(ii) What is the function of X?.
(b)Table 2 shows three current readings obtained by three students.
Table 2(i) Did all the students use the ammeter in Figure2? ..
.(ii) Explain your answer in (b)(i).
3. Figure 3 shows the meniscus of water in a measuring cylinder K, L, andM are three eye positions while measuring the volume of the water.
re 3 Figure 4
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(a) (i) Which of the eye positions is correct while taking the reading of thevolume of water?
.
(b) The water in the measuring cylinder is replaced with 30 cm3 ofmercury.
(i) In Figure 4, draw the meniscus of the mercury in the measuringcylinder.
(ii) Explain why the shape of the meniscus of mercury is as drawn in(b)(i).
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Assessment chapter 2
Part A : Objective Questions1. When a coconut is falling to the
ground, which of the following
quantities is constant?
A. Velocity
B. MomentumC. Acceleration
D. Kinetic energy
2. In an inelastic collision, which of thefollowing quantities remains
constant before and after the
collision?
A. Total acceleration
B. Total velocityC. Total momentum
D. Total kinetic energy
3. Calculate the weight of a stone with
mass 60 g on the surface of themoon.
(The gravitational acceleration of the
moon is 1/6 that of the Earth.)
A. 0.1 N
B. 0.2 NC. 0.4 N
D. 0.6 N
E. 0.8 N
4. The momentum of a particle is
dependent on
A. mass and acceleration
B. weight and force
C. mass and velocity5. Which of the following diagrams
shows a body moving at constant
velocity?
A. 2 N 2N
B. 12 N 7 N
C. 12 N 14 N
D. 20 N 17 N
6. The graph below shows the motionof a trolley with mass 1.5 kg.
Velocity / ms-1
4
0 2 4 6 Time / s
Calculate the momentum of thetrolley from t = 2s to t = 4s.
A. 1.5 kg m s-1B. 3.0 kg m s-1
C. 4.0 kg m s-1
D. 6.0 kg m s-1
E. 7.5 kg m s-1
7. This figure shows an aircraft flyingin the air.
8. m = 0.3 kg
5 m
Lift
Thrust Air friction
Weight
The aircraft above accelerates if
A. Lift > Weight
B. Thrust > Lift
C. Lift > Air friction
D. Thrust > Air friction
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What is the momentum of the stone
just before it hits the ground?
A. 0.15 kg m s-1
B. 0.3 kg m s-1
C. 1.5 kg m s-1
D. 3.0 kg m s-1E. 15.0 kg m s-1
9. A big ship will keep moving for some
distance when its engine is turned off.
This situation happens because the shiphas
A. great inertia
B. great accelerationC. great momentum
D. great kinetic energy
10. An iron ball is dropped at a height of
10 m from the surface of the moon.
Calculate the time needed for theiron ball to land.
(Gravitational acceleration of the
moon is 1/6 that of the Earth andg = 9.8 N kg-2)
A 0.6 sB 1.4 s
C 1.7 s
D 3.5 sE 12.0 s
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Part B : Structure Questions
1.
(i) Car A (ii) Car B
Diagram 1.1
Diagram 1.1(i) and (ii) show two methods used by the mechanic to move a breakdown
car. A constant force, F = 500 N is used to push and pull the car in method A and B.(a) (i) Which method is easier to move the car?
(ii) State a reason for your answer in (a)(i).
(b) The frictional force acting between the car and track surface in both methods is
200 N. Calculate, the(i) horizontal resultant force in method A.
(ii) horizontal resultant force in method B.
(iii) acceleration of the car in method B.
( c ) Suggest a method to move Car B so that the acceleration produced is equal to that
of method A.
....
2. ceiling
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Tin water M N hand
P Q R
(i) Diagram 2.1 (ii)
a) Diagram 2.1(i) shows tin P that is empty and tin Q that is filled with water. A
student find difficult to pushed tin Q. Write the inference about the observation.
b) Diagram 2.1(ii) shows a tin being released from the different positions M and N.
The hand of a student at position R needs greater force to stop the motion of the
tin falling from position M. Explain this observation.
c) Based on the observation (i) and (ii), state two factors that affect the magnitude of
the momentum of the object.
d) If water flows out from a hole at the bottom of the tin Q, how would the inertia of
Tin Q depends on time ?
3. 2 ms-1
P iron ball ( 2 kg )
S T3.0 m smooth surface
1.0 m 2.0 m
Q R
Diagram 3 Rough surface
The figure shows a iron ball that is rolled through PQRST. The rough surface of QR has
frictional force of 4 N.a) Calculate
(i) the kinetic energy of the iron ball at P.
(ii) the potential energy of the iron ball at P.
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(iii) the total of energy of the iron ball at P.
b)
c) (i) Calculate the total of energy of the iron ball when it reaches at Q ?
(ii) Calculate the work done against friction along QR.
d) Calculate the total kinetic energy of the iron ball at S.
e) Calculate the speed of the ball at position T.
Part C : Essay Questions
1.
(i) (ii)
Diagram 1.1
Diagram 1.1(i) shows the condition of a car moving at high velocity when it suddenly
crashes into a wall.
Diagram 1.1(ii) shows a tennis ball hit with racquet by a player.a) (i) What is the meaning of momentum?
(ii) Based on the observations of Diagram (i) and (ii), compare the
characteristics of car when it crashes into the wall and the tennis ball when
it is hit with a racquet. Hence, relate these characteristics to clarify aphysics concept, and name this concept.
b) Explain why a tennis player uses a taut racquet when playing.
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c) In launching a rocket, a few technical problems have to be overcome before the
rocket can move upright to the sky. By using appropriate physics concepts,describe the design of a rocket and the launch techniques that can launch the
rocket upright.
2.
Brand Reaction time / s Mass / kg
Engine thrust
force / N
Resistance
force / N
A 0.3 1.5 10.0 4.0
B 0.5 1.8 12.5 2.4
C 0.2 0.9 6.5 2.2
D 0.6 2.5 16.0 6.5
In a radio-controlled car racing competition, 4 mini-cars branded A, B, C and D tookpart. The information of the 4 cars is given in the table above. Details of the above
information are given as below;
Reaction time - Duration between the moment the radio-controlled is switched on andthe moment the car starts moving.
Resistance - Average value of opposing forces includes the friction between
wheels and track, and air resistance.
(a) What is the meaning ofacceleration?
(b) Draw a graph of velocity against time that shows a car moving initially withconstant acceleration, then moving with constant velocity and followed by
constant deceleration until it stops.
(c) Explain the suitability of the properties in the above table in constructing a radio-controlled car racing purpose. Hence, determine which brand of car will win the
50-metre race.
(c) If Car B in the above table is moved up the plane at the angle of 30o to the
horizon,
(i) Show that the car is able to move up the plane.(ii) Determine the acceleration of the car.
Properties
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Assessment Chapter 3
Part A: Objective Question
1. A cylinder has a mass of 12kg and a
cross-sectional area of 200cm2. What
is the pressure acting at its base?
A. 6 kPa D. 15 kPa
B. 9 kPa E. 18 kPa
C. 12 kPa
2. Wind blows normally on a wall at a
pressure of 200kPa. If the wall has
an area of 5m2, what is the force
acting on the wall?
A. 40kN D. 1200kN
B. 800kN E. 1600kN
C. 1000kN
3. Which of the following factor does
not influence the pressure of a
liquid?
A. Depth
B. Acceleration due to gravity
C. Density
D. Volume
4. Mercury has density of 13600kgm-3.
If the pressure of mercury is 650kPa,
what is the depth from its surface?
A. 4.0m D. 6.4m
B. 4.8m E. 8.0m
C. 5.8m
5. What is the pressure of the gas
trapped inside the J-tube, in Pa unit?
A. 1.19 x 105 Pa
B. 1.90 x 105 Pa
C. 2.19 x 105 Pa
D. 2.90 x 105 Pa
E. 3.14 x 105 Pa
6. Which instruments is meant for
measuring atmospheric pressure?
A. Carburetor
B. Siphon
C. Fortins Barometer
D. Hydrometer
7. Figure 7 shows a hydraulic jack.
Piston A and piston B have cross-
sectional areas 5cm2 and 100cm2
respectively. If mass of 3kg is placed
on piston A, what is the maximum
weight that can be lifted by piston B?
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A. 300N D. 900N
B. 600N E. 1000N
C. 800N
8. Which of the following device is
based on the Pascals Principle of
pressure transmission?
A. Hydrometer
B. Cars hydraulic brake
C. Bunsen burner
D. Fire extinguisher
9. A ship of mass 80000kg floats on the
sea surface. If the density of the sea
water is 1250kgm-3, what is the
volume of the displaced sea water?
A. 6.4 m3 D. 800 m3
B. 64 m3 E. 900 m3
C. 640 m3
10. Figure 10 shows metal tube is
blowed hardly at the opening. It is
observed that the polystyrene ball is
lifted to the opening of metal tube.
This phenomenon occurs because
A. The air velocity at the upper
section of the metal tube is
less than the air velocity at its
lower section.
B. The air pressure at the upper
section of the metal tube is
less than the air pressure at its
lower section.
C. The air density at the upper
section of the metal tube is
more than the air density at
its lower section.
D. The air temperature at the
upper section of the metal
tube is more than the air
temperature at its lower
section
Figure 7 Blow hard
Polystyreneball
Metal tube
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Part B: Structured Question
1.
FIGURE 1
Figure 1 shows a Perodua Myvi with a mass of 900 kg.
Air pressure for each tyre is 2 x 105 Pa.
(a) What is the meaning of pressure ?
.............................................................................................................................................
(b) Calculate the area in contact with the ground for each tyre.
(c) Zamani drives his car to his school with a distance of 10km and find his car tyre
become harder than usual. Explain why this is happen?
................................................................................................................................. ...........
......................................................................................................................
2. Diagram shows a set up of apparatus for measuring atmospheric pressure.
(a) What is the name for the instrument?
(b) Determine the atmospheric pressure as measured by the instrument ,
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(i) in the cm Hg unit
..
(ii) in the Pa unit
..
(c) State the change of length of the mercury column above the mercury surface
(i) The tube is raised by 10cm ...
.
(ii) The surrounding temperature increases
..
(iii) The instrument is brought to the peak of a mountain
..
(iv) Water vapor is brought to the vacuum region
Part C: Essay Question
1.
(a) A fisherman finds that his boat is at different levels in the sea and in the river, although
the boat carries the same load. The density of sea water is 1 025 kg m-3 and of river water
is 1 000 kg m-3.
Figure 1 and 2 illustrate the situation of the boat in the sea and in the river.
(i) What is meant by density?
(ii) Using Figure 1 and 2, compare the levels of the boat and the volumes of water
displaced by the boat.
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Relating the mass of the boat with its load, the volume of water displaced and the
density of the water, deduce a relevant physics concept.
(iii) Name the physics principle that explains the above situation.
(b) A submarine can sail on the sea surface and under the sea.
Explain how a submarine on the surface submerges.
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
2. Figure below shows an iron penetrates a layer of sand placed in a beaker. When
water is poured into the beaker, the iron rod makes another penetration into the sand layer as
shown in figure below.
Based on the observation,
a) state one suitable inference that can be made
Iron rod
Sand
Water
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b) state one appropriate hypothesis for an investigation
c) with the use of apparatus such as spring balance, load, thread, eureka can and other
apparatus, describe an experiment framework to test your hypothesis. In your description, state
clearly the following:
i) aim of the experiment
ii) variable in your experiment
iii) list of apparatus and materials
iv) arrangement of the apparatus in a sketch
v) the procedure of the experiment
vi) the way you list the data
vii) the way you would analyse the data
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PART A: CHAPTER 4
1. A 5kg iron sphere of temperature
500C is put in contact with a 1kg copper
sphere of temperature 273K and they are put
inside an insulated box. Which of thefollowing statements is correct when they
reach thermal equilibrium?
A. A iron sphere will have a
temperature of 273KB. The copper sphere will have
a temperature of 500C.C. Both the sphere have the
same temperature.
D. The temperature of the iron
sphere will be lower than 500C
2. In the process to transfer heat from
one object to another object, which of thefollowing processes does not involve a
transfer to material?
A. ConvectionB. Vaporisation
C. Radiation
D. Evaporation
3. When we use a microwave oven to
heat up some food in a lunch box, we should
open the lid slightly. Which of the followingexplanations is correct?
A. To allow microwave to go
inside the lunch boxB. To allow the water vapors to
go out, otherwise the box will
explodeC. To allow microwave to
reflect more times inside the
lunch box
D. To allow microwave to
penetrate deeper into the lunch
box.
Water is generally used to put outfire. Which of the following explanation is
not correct?A. Water has a high specific
heat capacity
B. Steam can cut off the supply
of oxygenC. Water is easily available
D. Water can react with some
material
Given that the heat capacity of a
certain sample is 5000 J0C-1. Which of thefollowing is correct?
A. The mass of this sample is
1kg.B. The energy needed to
increase the temperature of 1 kg
of this sample is 5000 J.
C. The energy needed toincrease the temperature of 0.5kg
of this sample is 2500J.
D. The temperature of thissample will increase 10C when 5
000 J energy is absorbed by this
sample.
Which of the following statement is
correct?
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A. The total mass of the object is
kept constant when fusion
occurs.B. The internal energy of the
object is increased when
condensation occursC. Energy is absorbed when
condensation occurs.
D. Energy is absorbed whenvaporization occurs.
7. Water molecules change their states
between the liquid and gaseous statesA. only when water vapour is
saturatedB. at all times because
evaporation and condensation
occur any time
C. only when the vapour molecules produce a pressure as
the same as the atmospheric
pressureD. only when the water is
boiling
8. Based on the kinetic theory of gas
which one of the following does not explain
the behaviour of gas molecules in acontainer?
A. Gas molecules move
randomly
B. Gas molecules collideelastically with the walls of the
container
C. Gas molecules move faster astemperature increases
D. Gas molecules collide
inelastically with each other
9. A cylinder which contains gas is
compressed at constant temperature of the
gas increase because
A. the average speed of gas
molecules increases
B. the number of gas moleculesincreases
C. the average distance between
the gas molecules increasesD. the rate of collision between
the gas molecules and the walls
increases
10. A plastic bag is filled with air. It is
immersed in the boiling water as shown in
diagram below.
Which of the following statements is
false?
A. The volume of the plastic bag
increases.
B. The pressure of air moleculesincreases
C. The air molecules in the bag
move fasterD. The repulsive force of boiling
water slows down the movement
of air molecule
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PART B;
1. A research student wishes to carry out an investigation on the temperature change
of the substance in the temperature range -500C to 500C. The instrument used to measure
the temperature is a liquid in glass thermometer.
Table 1
(a) (i) State the principle used in a liquid- in glass thermometer.(1m)
............................................................................................................................
........
(i) Briefly explain the principle stated in (a)(i) (3m)
(b) Table 1 shows the characteristic of 4 types of thermometer: A,B C and D. On the
basis of the information given in Table 1, explain the characteristics of, and
suggest a suitable thermometer for the experiment.(5 m)
Thermometer A B C D
Liquid Mercury Mercury Alcohol Alcohol
Freezing point of liquid (0C) -39 -39 -112 -112
Boiling point of liquid (0C) 360 360 360 360
Diameter of capillary tube Large Small Large Small
Cross section
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(c) The length of the mercury column in uncalibrated thermometer is 6.0cm and 18.5
cm at 00C and 1000C. respectively. When the thermometer is placed in a liquid,
the length of the mercury column is 14.0cm
(i) Calculate the temperature of the liquid
(ii) State two thermometric properties which can be used to calibrate a
thermometer. (6m)
2. A metal block P of mass 500 g is heated is boiling water at a temperature of
1000C. Block P is then transferred into the water at a temperature of 300C in a
polystyrene cup. The mass of water in the polystyrene cup is 250 g. After 2 minutes, the
water temperature rises to 420C.
Figure 2
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Assuming that the heat absorbed by the polystyrene cup and heat loss to the
surroundings are negligible.{Specific heat capacity of water 4 200 j kg-1 C-1)
Calculate
(a) the quantity of heat gained by water the polystyrene cup
(b) the rate of heat supplied to the water
(c) the specific heat capacity of the metal block P
3. A student performs an experiment to investigate the energy change in a system.
He prepares a cardboard tube 50.0 cm long closed by a stopper at one end. Lead shot of
mass 500 g is placed in the tube and the other end of the tube is also closed by a stopper.
The height of the lead shot in the tube is 5.0 cm as shown in Figure 3.1. The student then
holds both ends of the tube and inverts it 100 times (Figure 3.2).
Figure 3.1 Figure 3.2
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(a) State the energy change each time the tube is inverted.
(b) What is the average distance taken by the lead shot each time the
tube is inverted?
(c) Calculate the time taken by the lead shot to fall from the top to
the bottom of the tube.
(d) After inverting the tube 100 times, the temperature of the lead
shot is found to have increased by 30C.
i. Calculate the work done on the lead shot.
ii. Calculate the specific heat capacity of lead.
iii. State the assumption used in your calculation in (d)ii.
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PART C: EXPERIMENT
1. Before travelling on a long journey, Luqman measured the air pressure the
tyre of his car as shown in Figure (a) He found that the air pressure of the tyre was
200 kPa. After the journey, Luqman measured again the air pressure of the tyre as
shown in Figure (b) He found that the air pressure had increase to 245 kPa.
Luqman also found that the tyre was hotter after the journey although the size of
the tyre did not change.
Using the information provided by Luqman and his observations on air pressure
in the tyre of his car:
(a) State one suitable inference that can be made. [1 mark]
(b) State appropriate hypothesis for an investigation. [1 mark]
(c) Design an experiment to investigate the hypothesis stated in (b).
Choose suitable apparatus such as pressure gauge, a round-bottomed flask and
any other apparatus that may he necessary. In your description, state clearly the
following:
i. Aim of the experiment,
ii. Variables in the experiment,
iii. List of apparatus and materials,
iv. Arrangement of the apparatus,
Figure (a) Figure (b)
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v. The procedure of the experiment including the method of controlling the
manipulated variable and the method of measuring the responding variable,
vi. The way you would tabulate the data,
vii. The way you would analyse the data. [10 marks]
Inference
Hypothesis
Aim
Variable Constant variable :
Manipulate variable :
Responding variable :
Material and Apparatus
Arrangement of
apparatus
Procedure
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Tabulation of Data
Analysis of Data
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Assessment chapter 5 Light
Part A:
1. Between the following statements about reflection of light, which is not true?
A. All light energy incident on a plane mirror is reflected.
B. The angle of incidence is always the same as the angle of reflection.C. The incident ray, the reflected ray and the normal to the point of incidence, all lie
on the same plane.
D. The speed of the reflected ray is the same as the speed of the incident ray.
2. A boy stands in front of a plane mirror. He observes the image of some letterings
printed on his shirt. The letterings on his shirt is as shown in Figure 1.
Between the following images, which is the image observed by the boy?
3. Figure 2 shows an object, O placed in front of a plane mirror. Between the positions
A, B, C and D, which is the position of the image?
4. A student is moving with a velocity of 2 m s-1 towards a plane mirror. The distancebetween the student and his image will move towards each other at the rate
A. 2 m s-1 B. 3 m s-1 C. 4 m s-1 D. 5 m s-1 E. 6 m s-1
Figure 1
A B C D
O
A B C D
Plane mirror
Figure 2
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5. The table below shows the characteristics of the images formed by a concave
mirror for various positions of the object. All symbols used have the usual meanings.Which of them is not true?
Position of object Characteristics of imageA u > 2f Diminished, inverted, real
B f < u < 2f Magnified, inverted, real
C u = f Same size, inverted, real
D u < f Maginfied, upright, virtual
6. Which of the following ray diagram is correct?
7. The depth of a swimming pool appears to be less than its actual depth. The lightphenomenon which causes this is
A. ReflectionB. Refraction
C. Diffraction
D. Interference
8. The critical angle in glass is 42o. What is the refractive index of glass?
A. 1.2 B. 1.3 C. 1.4 D. 1.5 E. 1.6
9. Which of the following are the characteristics of an image formed by a magnifying
glass?
A. Magnified, virtual, inverted
B. Diminished, real, uprightC. Magnified, virtual, upright
D. Diminished, virtual, inverted
50o50o
C F
Convex mirror
C F
Concave mirrorPlane mirror
A B C
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10. A student is given three convex lenses of focal lengths 2 cm, 10 cm and 50 cm. He
wishes to construct a powerful astronomical telescope. Which of the following
arrangements should he choose?
Focal length of objective lens /
cm
Focal length of eye lens / cm
A 50 2
B 10 10
C 2 50
D 50 10
Part B
1.
Figure 3 shows the eye of a person looking at a fish.
a) Sketch a ray diagram consisting of 2 rays originating from the eye of the fish to showwhy the image of the fish is seen closer to the surface.
b) The fish is at a depth of 2 m. If the refractive index of water is 1.33, calculate the
apparent depth of the fish.
air
water
Eye
Figure 3
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2.
a) Starting with the lens formula,fvu
111=+ , derive an equation that gives the
relationship between liner magnification, m and the image distance, v. Hence sketch the
graph ofm against v on the axes provided below.
(b) State the value ofm at the point of intersection of the graph with the vertical axis.
(c) Describe how you would determine the focal length of the lens using the graph.
Part C
1.
A student used a slide projector to project a picture onto the screen. Figure 1a and 1b
show the relative positions of the slide, projector lens and the screen.It is observed that when the screen is moved further away (Figure 1b), the lens of the
projector has to be moved nearer to the slide to obtain a sharp image.
0
m
v
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Based on your observations and knowledge of lenses;
a) make one suitable inference.
b) state an appropriate hypothesis that could be investigated.
c) describe how you would design an experiment to test your hypothesis using a convex
lens, filament bulb and other apparatus.
In your description, state clearly the following:
(i) aim of the experiment
(ii) variables in the experiment
SlideScreen
image
Figure 1a
Figure 1b
Projector
lens
Projector
lens
Slide
Screen
image
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(i) List of apparatus and materials
(ii) Arrangement of the apparatus
(iii) The procedure of the experiment, which includes the method of controlling the
manipulated variable and the method of measuring the responding variable
(iv) The way you tabulate the data
(v) The way you would analyse the data
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2.
A student carried out an experiment to investigate the relationship between object
distance, u, and image distance, v, for a convex lens. The student used various valuesofu and recorded the corresponding values ofv. The student then plotted the graph
of uv against u + v as shown in Figure 2.
Figure 2
500
450
400
35055
3000
250
2000
150
100
50
uv/ cm2
10 20 30 40 50
u + v / cm
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a) Based on the graph in Figure 2,
(i) state the relationship between uv and u + v
[1 mark](ii) determine the value ofu + v when the value ofuv = 400 cm2. Show on the
graph how you obtained the value of u + v.
From the value ofu + v obtained, calculate the image distance, v when u = 20
cm.
[3 marks](iii) calculate the gradient of the graph. Show clearly on the graph how you
obtained the values needed for the calculation.
[3 marks]b) Given that the relationship between u, v and focal length,fof the convex lens used, is
represented by the equation
1 + 1 = 1 u v f
Derive an equation which gives the relationship between uv and (u + v ).
[2 marks]c) Using the equation derived in (b), and the value of gradient calculated in (a)(iii),
determine the focal length of the lens used in the experiment.
[2 marks]d) State one precaution taken to ensure the accuracy of the experiment.
[1 mark]
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