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AGA KHAN UNIVERSITY EXAMINATION BOARD
SECONDARY SCHOOL CERTIFICATE
CLASS IX
MODEL EXAMINATIONS
Physics Paper I
Time: 1 hour 10 minutes Marks: 40
INSTRUCTIONS
Please read the following instructions carefully.
- Read each question carefully.
- Answer the questions on the separate answer sheet provided. DO NOT write your answers on the question paper.
- There are 100 answer numbers on the answer sheet. Use answer numbers 1 to 40 only.
- In each question there are four choices A, B, C, D. Choose ONE. On the answer grid black out the circle for your choice with a pencil.
- If you want to change your answer, ERASE the first answer completely with a rubber, before blacking out a new circle.
- DO NOT write anything in the answer grid. The computer only records what is in the circles.
- You may use a simple calculator if you wish.
Physics Paper I • CLASS IX (2025)Total 40 Examination Items • SLO Mapped
Q.1.
If the volume of one cube is , then the volume of twenty-one such cubes rounded off to three significant figures is
2025 Syllabus: SLO 1.7.2 • Measurement ↗Cognitive Level: A (Application)
2025 SLO Outcome (1.7.2): apply the rules for rounding a number to the appropriate number of significant figures.
A.
.
B.
.
C.
.
D.
.
Q.2.
The number 123.4 can also be written in scientific notation as
2025 Syllabus: SLO 1.3.2 • Measurement ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (1.3.2): convert numerical values of measurement in scientific notation;
A.
B.
C.
D.
Q.3.
The prefix used for the multiple value of is
2025 Syllabus: SLO 1.3.1 • Measurement ↗Cognitive Level: R
2025 SLO Outcome (1.3.1): convert prefixes and their symbols to indicate multiples and sub-multiples for base and derived units;
A.
atto.
B.
pico.
C.
nano.
D.
femto.
Q.4.
Which of the following instruments is used to measure the internal diametre of a pipe?
2025 Syllabus: SLO 1.5.3 • Measurement ↗Cognitive Level: R
2025 SLO Outcome (1.5.3): describe the working of measuring instruments;
A.
Metre rule
B.
Screw gauge
C.
Vernier callipers
D.
Measuring cylinder
Q.5.
All of the following are the scalar quantities EXCEPT
2025 Syllabus: SLO 1.4.2 • Measurement ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (1.4.2): list out various physical quantities as scalar or vector;
A.
time.
B.
mass.
C.
distance.
D.
velocity.
Q.6.
A child drops a tennis ball from a height of . The velocity of the ball just before it strikes the ground will be
(Note: The value of acceleration due to gravity is .)
2025 Syllabus: SLO 2.5.2 • Kinematics ↗Cognitive Level: A (Application)
2025 SLO Outcome (2.5.2): solve word problems related to free-falling bodies using the relation g = Δv/ Δt.
A.
.
B.
.
C.
.
D.
.
Q.7.
The given table shows the distance covered by a car on a straight road in four different segments.
If the car takes same interval of time to cover all four segments, then the car
2025 Syllabus: SLO 2.3.2 • Kinematics ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (2.3.2): calculate average speed, average velocity and acceleration;
A.
is accelerating.
B.
is decelerating.
C.
has uniform velocity.
D.
comes to rest after each segment.
Q.8.
If a force of is acting on a body along the x-axis, then the value of this force acting on the y-axis will be
2025 Syllabus: SLO 4.1.3 • Turning Effect of Forces ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (4.1.3): solve word problems related to the moment of force or torque = force × perpendicular distance from the pivot to the line of action of force;
A.
.
B.
.
C.
.
D.
.
Q.9.
Consider the given speed-time graph. The speed of an object from point X to Y is
2025 Syllabus: SLO 2.4.3 • Kinematics ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (2.4.3): infer the following states of a body based on the given graph: a. at rest, b. moving with constant speed, c. moving with positive acceleration, d. moving with negative acceleration;
A.
decreasing.
B.
increasing.
C.
uniform.
D.
zero.
Q.10.
A force pulls a system of three masses (, , ) on a horizontal frictionless surface as shown in the given figure. The acceleration of this system of masses is
2025 Syllabus: SLO 3.3.3 • Dynamics ↗Cognitive Level: A (Application)
2025 SLO Outcome (3.3.3): identify the effect of force on velocity of a body acting in the:
a. same direction,
b. opposite direction,
c. perpendicular direction;
A.
.
B.
.
C.
.
D.
.
Q.11.
An astronaut is sitting in a rocket on Earth which is ready to launch to the Moon. When the astronaut will reach the Moon, his/ her weight and mass would
2025 Syllabus: SLO 3.1.1 • Dynamics ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (3.1.1): differentiate between mass and weight;
A.
Weight: Increase | Mass: remain the same
B.
Weight: remain the same | Mass: increase
C.
Weight: Decrease | Mass: remain the same
D.
Weight: remain the same | Mass: decrease
Q.12.
How much centripetal force is needed to move a body of mass in a circle of radius with a speed of ?
2025 Syllabus: SLO 3.6.2 • Dynamics ↗Cognitive Level: A (Application)
2025 SLO Outcome (3.6.2): exemplify the sources of centripetal force during circular motion in terms of:
a. tension,
b. frictional force,
c. gravitational force.
A.
.
B.
.
C.
.
D.
.
Q.13.
If a body of mass is placed on the surface of the Earth, then the pull of the Earth on the body will be
(Note: The value of acceleration due to gravity is .)
2025 Syllabus: SLO 3.1.4 • Dynamics ↗Cognitive Level: A (Application)
2025 SLO Outcome (3.1.4): solve word problems using the relation w = mg;
A.
.
B.
.
C.
.
D.
.
Q.14.
It is difficult to drive a car on an oily road because the frictional force
2025 Syllabus: SLO 3.5.1 • Dynamics ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (3.5.1): define friction;
A.
increases.
B.
decreases.
C.
becomes zero.
D.
remains unchanged.
Q.15.
Two forces ( and ) act at the right angle at point O, as shown in the given figure. What will be the magnitude and direction of the resultant force?
2025 Syllabus: SLO 1.4.4 • Measurement ↗Cognitive Level: A (Application)
2025 SLO Outcome (1.4.4): determine, using Pythagoras theorem and graphs, the resultant of two vectors at right angle;
A.
along OQ
B.
along PR
C.
along OQ
D.
along PR
Q.16.
A sports racing car is made stable by
2025 Syllabus: SLO 4.4.5 • Turning Effect of Forces ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (4.4.5): describe the states of equilibrium and classify them with common examples.
A.
raising its height.
B.
increasing its speed.
C.
decreasing its width.
D.
lowering its centre of gravity.
Q.17.
The perpendicular distance between axis of rotation and the line of action of force is called
2025 Syllabus: SLO 4.1.3 • Turning Effect of Forces ↗Cognitive Level: R
2025 SLO Outcome (4.1.3): solve word problems related to the moment of force or torque = force × perpendicular distance from the pivot to the line of action of force;
A.
momentum.
B.
acceleration.
C.
moment arm.
D.
displacement.
Q.18.
After disturbance, if a body comes to rest and its centre of gravity remains unchanged, then this state of the body is/ are identified as
I.stable equilibrium
II.unstable equilibrium
III.neutral equilibrium
2025 Syllabus: SLO 4.4.4 • Turning Effect of Forces ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (4.4.4): explain different conditions of equilibrium with examples;
A.
I only.
B.
III only.
C.
I and III.
D.
II and III.
Q.19.
Let suppose, a hole is drilled through the Earth along the diametre and a stone is dropped into it. Suppose when the stone reaches the Earth’s centre keeping same size and shape, it will have constant
Out of 2025 SyllabusCognitive Level: A (Application)
A.
mass.
B.
weight.
C.
momentum.
D.
acceleration.
Q.20.
A satellite is revolving around the Earth in a circular orbit with velocity v. If the gravitational force between the satellite and the Earth suddenly disappears, then the velocity of the satellite will be
Out of 2025 SyllabusCognitive Level: U (Understanding)
A.
0
B.
½ v
C.
v
D.
2v
Q.21.
If a planet comes closer to the Sun, then the planet will
Out of 2025 SyllabusCognitive Level: U (Understanding)
A.
orbit faster.
B.
orbit slower.
C.
fall into the Sun.
D.
keep moving with the same speed.
Q.22.
The gravitational force between two objects is directly proportional to the
2025 Syllabus: SLO 3.2.3 • Dynamics ↗Cognitive Level: R
2025 SLO Outcome (3.2.3): identify the following forces as contact and non-contact forces:
a. air resistance,
b. drag force (push, pull),
c. electrostatic force,
d. force of friction,
e. gravitational force,
f. magnetic force,
g. tension (elastic force),
h. thrust (driving force);
A.
sum of their masses.
B.
product of their masses.
C.
difference between their masses.
D.
square of the distance between them.
Q.23.
A car travels a distance of 150 m in the direction of a constant force of 50 N. The work done on the car is
2025 Syllabus: SLO 6.1.2 • Work, Energy and Power ↗Cognitive Level: A (Application)
2025 SLO Outcome (6.1.2): solve word problems related to workdone;
A.
3 J.
B.
100 J.
C.
200 J.
D.
7500 J.
Q.24.
A car has stopped after screeching to avoid a crash with a van. With reference to the given situation, the kinetic energy of the car will then be converted into
2025 Syllabus: SLO 6.4.1 • Work, Energy and Power ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (6.4.1): state law of conservation of energy;
A.
sound energy only.
B.
heat and sound energy.
C.
heat and potential energy.
D.
potential and sound energy.
Q.25.
If a loading truck has an output of 3600 J and its efficiency is 50%, then the input provided to the truck will be
2025 Syllabus: SLO 6.5.3 • Work, Energy and Power ↗Cognitive Level: A (Application)
2025 SLO Outcome (6.5.3): explain that a system cannot have an efficiency of 100%;
A.
18 J.
B.
72 J.
C.
7200 J.
D.
10800 J.
Q.26.
The kinetic energy of a 0.5 kg bullet moving with velocity of 500 m/s is
2025 Syllabus: SLO 6.3.3 • Work, Energy and Power ↗Cognitive Level: A (Application)
2025 SLO Outcome (6.3.3): solve word problems related to the kinetic and potential energy;
A.
125 J.
B.
250 J.
C.
62500 J.
D.
125000 J.
Q.27.
If a person releases 500 J of energy by walking along a track in 125 seconds, then the required average muscular power is
2025 Syllabus: SLO 6.6.3 • Work, Energy and Power ↗Cognitive Level: A (Application)
2025 SLO Outcome (6.6.3): explore different innovative energy transfer devices used in transportation and communication.
A.
0.25 W.
B.
4.0 W.
C.
375 W.
D.
625 W.
Q.28.
Compared to the sea level, the atmospheric pressure on mountains is
2025 Syllabus: SLO 7.3.2 • Pressure ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (7.3.2): describe the use of the height of a liquid column to measure the atmospheric pressure (barometer);
A.
zero.
B.
equal.
C.
lower.
D.
higher.
Q.29.
To push the liquid up in a straw, the air pressure inside the straw will
2025 Syllabus: SLO 7.3.1 • Pressure ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (7.3.1): explain atmospheric pressure;
A.
increase.
B.
decrease.
C.
become zero.
D.
remain constant.
Q.30.
According to the kinetic molecular model of matter, the molecules of a substance
2025 Syllabus: SLO 8.1.1 • Thermal Physics ↗Cognitive Level: R
2025 SLO Outcome (8.1.1): state the basic assumptions of the kinetic theory of matter;
A.
are in the state of rest.
B.
are in the state of motion.
C.
have constant momentum.
D.
have same velocity during collision.
Q.31.
A parcel box of weight 500 N is placed on a table. If the area of the bottom of the box is measured as 0.50 m2, then the pressure exerted by the box on the table will be
2025 Syllabus: SLO 7.2.2 • Pressure ↗Cognitive Level: A (Application)
2025 SLO Outcome (7.2.2): explain that pressure varies with force and area with the help of real-life examples;
A.
250 Pa.
B.
499.5 Pa.
C.
500.5 Pa.
D.
1000 Pa.
Q.32.
In a magic show, a performer lies down on a bed of nails without any injury. However, when the same performer steps on a single nail, it goes right through his foot. With reference to the given situation, which of the following statements is TRUE?
2025 Syllabus: SLO 7.2.1 • Pressure ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (7.2.1): define the term ‘pressure’;
A.
The area is same in both the cases, but more force is applied on the bed of nails.
B.
The force remains the same, but more pressure is applied on the bed of nails.
C.
More force is exerted on a single nail than on the entire bed of nails.
D.
Force increases, but less pressure is applied on the bed of nails.
Q.33.
In a clinical thermometer, mercury does NOT fall back to the bulb because
2025 Syllabus: SLO 8.3.4 • Thermal Physics ↗Cognitive Level: R
2025 SLO Outcome (8.3.4): illustrate the sensitivity, range and linearity of thermometers using diagram;
A.
it is less in quantity.
B.
it is in a capillary tube.
C.
of the shape of the thermometer’s bulb.
D.
of the constriction in the capillary tube.
Q.34.
The escape of high kinetic energy molecules in the form of vapours from the surface of a liquid without heating is known as
2025 Syllabus: SLO 8.2.7 • Thermal Physics ↗Cognitive Level: R
2025 SLO Outcome (8.2.7): solve word problems involving the concept of specific heat capacity, latent heat of fusion and vaporisation;
A.
fusion.
B.
boiling.
C.
evaporation.
D.
condensation.
Q.35.
If an inflated tyre of a car bursts, then the temperature of air that will escape from the tyre
2025 Syllabus: SLO 8.1.3 • Thermal Physics ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (8.1.3): describe plasma as the fourth state of matter;
A.
increases.
B.
decreases.
C.
becomes 100°C.
D.
remains constant.
Q.36.
If the temperature of a substance is 20°C, then its temperature in Kelvin scale will be
2025 Syllabus: SLO 8.3.3 • Thermal Physics ↗Cognitive Level: A (Application)
2025 SLO Outcome (8.3.3): explain that a physical property that varies with temperature can be used as a criteria to measure temperature;
A.
– 253 K.
B.
– 6.66 K.
C.
68 K.
D.
293 K.
Q.37.
An example of a good conductor of heat is a
2025 Syllabus: SLO 9.1.2 • Transfer of Thermal Energy ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (9.1.2): define the term ‘thermal conductivity’;
A.
glass door.
B.
frying pan.
C.
wooden door.
D.
leather jacket.
Q.38.
Radiations’ incident on a surface increases its temperature. Which of the following characteristics should be present in a surface that can protect itself MOST effectively against radiation?
2025 Syllabus: SLO 9.3.3 • Transfer of Thermal Energy ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (9.3.3): describe that the rate of emission of radiation depends on the surface temperature and surface area of an object;
A.
Poor absorber and poor emitter
B.
Poor absorber and good emitter
C.
Good absorber and poor emitter
D.
Good absorber and good emitter
Q.39.
The process of transfer of heat in liquids and gases is/ are called
I.conduction
II.convection
III.radiation
2025 Syllabus: SLO 9.2.1 • Transfer of Thermal Energy ↗Cognitive Level: R
2025 SLO Outcome (9.2.1): explain convection in liquids and gases in terms of density changes with reference to the following real-life examples:
a. gliders,
b. flying of birds,
c. land breezes and sea breezes;
A.
I only.
B.
II only.
C.
I and III.
D.
II and III.
Q.40.
When a wooden spoon is dipped in a bowl of soup, it does not become hot. In the given situation, the wooden spoon acts as a/ an
2025 Syllabus: SLO 9.1.3 • Transfer of Thermal Energy ↗Cognitive Level: U (Understanding)
2025 SLO Outcome (9.1.3): describe the factors affecting the transfer of heat through solid conductors;
A.
electrical conductor.
B.
electrical insulator.
C.
heat conductor.
D.
heat insulator.
S2501-1711110END OF PAPERPhysics Paper I