1. The document contains a physics exam for 10th grade with three sections - multiple choice questions, short answer questions, and detailed answer questions. 2. The multiple choice section has 17 questions testing concepts like the laws of reflection, units of measurement, forces, equilibrium, and properties of matter. 3. The short answer section directs students to answer 14 of 21 questions testing additional concepts such as kinematics equations, energy, power, density, phases of matter, and wave properties. 4. The detailed answer section provides two optional questions involving principles like Archimedes' principle, inclined planes, simple harmonic motion, optics, sound, and wave diagrams.

1. A AL-HUDA SCHOOL
Campus III (Boys Section)
st
1 Preliminary Examination 2012-13
Physics
Grade X
Name: _________________________________Date:____________
Time: 30 minutes Max. Marks: 17
SECTION “A” (COMPULSORY)
(MULTIPLE CHOICE QUESTIONS)
Instruction: This paper of Physics (Theory) (Class X – New Model) consists of two
separate question papers; the first paper (Section “A”) consists of
M.C.Q’s. This paper of 30 minutes duration will be given to you first of all
and collected back as soon the time is over. Then you will be given the
next paper of 2 ½ Hours consisting of short-Answer Questions (Section
B”) and detailed-Answer Questions (Section “C”)
General Instruction:
Section A: This section consists of 17 Multiple Choice Questions (M.C.Q’s) and all
are to be answered.
Section B: This section consists of 21 short answer questions out of which 14 are to
be answered.
Section C: This section consists of 3 detailed answer questions out of which 2
questions are to be answered.
SECTION „A‟ MULTIPLE CHOICE QUESTION (MCQ‟s)
1. Choose the correct answer for each from the given options: (17)
(i) The Laws of Reflection were first introduced by:
a) Yaqoob Al-Kindi b) Ibn-ul-Haitham c)Moosa Khawarzmi d) Al beruni
(ii) one meter is equal to
a) 103mm b) 104mm c) 105mm d) 106mm
(ii) Velocity V = __________________.
a) S/t b) V/t c) m/t d) none
iv) By applying equal force on spheres of plastic and iron of equal volumes greater
acceleration is produced in the plastic sphere because its mass is ____________.
a) More b) less c) more but µ is less d) less but µ more
v) which is the best approximation of the weight of an object of mass 800 gram?
a) 88N b) 80N c) 0.8N d)8N e) 0.08N f) 7.840N
vi) if Fx and Fy are rectangular component of a force F then tan θ = ____________.
a) Fx /Fy b) Fy/ Fx c) Fx+ Fy d) Fx-Fy
vii) clock wise torque is considered as
a) Positive b) negative c) unit torque d) zero torque
viii) the centre of gravity of uniform rod is
a) End of rod b) centre of rod c) both a &b d) none of these
ix) lf the sum of all the forces on a body is equal to zero, then it is said to be in
a) Translational b) rotational c) static d) dynamic equilibrium
x) in case of satellites the necessary acceleration is provided by_______________.

2. a) frictional force b) gravitational force c) coulombs force
xi) the work will be positive if the angle between force and displacement is
a) 90 b) 180 c) 0 d) none
xii) power and velocity relation can be define as P= ____________
a) Fv b) ma c) Fm d) none
xiii) rain drops are found spherical in shape because of one of the following properties of
matter
a) Surface tension b) viscosity c) Pressure d) Torque
xiv) Archimedes principle is applied to determine
a) Specific heat b) specific gravity c) specific resistance
xv) At STP pure water boils at
a) 0K b) 100K c) 273K d) 237K e) 227K
xvi)bimetallic strip is used in temperature control devices because the two metals used
in a bimetallic strip
a) Expand unequally when heated b) are good conductors of heat c) conduct heat
at different rates d) can bend easily
xvii) the volume of a gas when heated increases much more then for a solid or liquid
because
a)The particles of a gas expand more b) the attractive forces between the molecule of a
gas are negligible c) the particles of solid and liquid cannot move d) the molecule of a
gas are lighter
SECTION „B‟ (SHORTH – ANSWER QUESTIONS)
Time: 2 ½ Hours Max. Marks: 68
Note: Answer any 14 questions from this section. No answer should exceed 3 to 5
sentences.
2: Derive the equation 2aS = Vf2- vi2
3: Define the following
a) velocity b) acceleration c) momentum d) torque
4: Define reflection and refraction of light? Also state there two laws? Draw a drawing
showing reflection and refraction?
5: A person hears an echo of his own from a distant hill side after 4 seconds; how far
away is the person from the hill, if the speed of sound is 330 m/sec.
6: A 5g bullet is fired from an 800g pistol with speed of 50 m/sec. what is the speed of
the recoil of the pistol.
7: Write three states of equilibrium? Explain it with example?
8: A force of 50 N acts on the body, if the moment arm is 5m. find the value of torque.
9: State law of universal Gravitation. Also derive its formula?
10: Define centripetal force and also write its formula?
11: A car of mass 1500kg moving in a circular path of radius 20m at a speed of 20
m/sec. find its centripetal acceleration?
12: What is the difference between kinetic and potential energy also derive the equation
of kinetic energy K.E = ½ mv2
13: Define the following? Give example and write the formula of them?
a) work b) energy c) power

3. 14: A car of mass 1000kg travelling at 72km/hr is uniformly brought to rest over a
distance of 40m. Find the average acceleration and the average breaking force.
15: Derive the equation of mass of earth? Find the value of mass of earth?
16: Define anomalous expansion of water? How does it help the aquatic animals to
save their lives in frozen seas?
17: What is the different mode of transfer of heat? Also define specific heat, latent heat
of fusion, latent heat of vaporization?
18: Differentiate between transverse and longitudinal waves? Also define the following
terms wavelength, frequency, and time period?
19: Describe the pin hole camera? Explain the formation of an image formed by a plane
mirror?
20: Describe the construction and action of compound microscope? Explain the function
of human eye? What are the main defects of a human eye?
21: An object is placed at a distance of 30cm from a concave mirror of focal length 5 cm.
if the object is 5cm in height. Find the position and size of the image?
22: Define Boyle’s law, Charles’s law? Derive the equation of general gas equation?
SECTION „C‟ (DETAILED – ANSWER QUESTIONS)
Note: Attempt any 2 questions from this section. (26)
23: a) State and explain Archimedes Principle. Give one application in finding the
density of different substances.
b) If a given mass of a gas has a volume of 4.5x10 -5m3 at a pressure of 30.0 kPa what
will be the volume of the gas if the pressure is increased to 50.0 kPa while the
temperature is kept constant?
c) Define the following a) viscosity b) surface tension c) Young Modulus d) Barometer
e) atmospheric pressure f) hooks law
24: a) What is an inclined plane? How does it help in doing work? Write down the
mechanical advantage of an inclined plane?
b) Define Simple Harmonic motion? Write down the formula and explain it with
mass attached to a spring shows simple harmonic motion?
c) A body of mass 0.3kg is attached to a horizontal spring. If the value of the spring
constant is 5N/m find the time period of the body if it is gone a small displacement,
25: a) Define the following terms a) refractive index b) critical angle c) power of lens d)
magnifying glass.
b) Define beats? And write the characteristics of sound? And explain the audible frequency
range?
c) Explain node, antinodes, crest, trough, compression, rarefaction, by the help of a wave
diagram?