This document contains a physics exam for 10th grade students with three sections: Section A contains 17 multiple choice questions, Section B contains 21 short answer questions requiring answers to 14, and Section C contains 3 long answer questions requiring answers to 2. The exam covers topics in physics including work, energy, machines, properties of matter, heat, optics, electricity, waves, and nuclear reactions. Students are instructed to answer all questions in Section A, choose 14 questions to answer in Section B, and answer 2 of 3 questions in Section C, all within the allotted time limits.

1. AL-HUDA SCHOOL
Campus III (Boys Section)
2nd
Preliminary Examination 2012-2013
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. 1 joule is equal to
a) 1 N-S b) 1lb-m c) 1N-m
ii. Power is define as
a) Rate of change of position b) rate of change of force c) time rate of doing work
iii. A __________________ is a simple machine
a) First b) second c) third
iv. Elasticity of the substance depends on its
a) Temperature b) size c) nature
v. Random motion of the molecule in a fluid was first discovered by
a) Robert Boyle b) Robert Brown c) Newton
vi. The temperature of a substance changes from -20C to 20C. What is the temperature
change in Kelvin’s scale?
a) 0K b) 20K c) 40K d)293K e) 400K

2. vii. Mercury is commonly used as the working liquid in laboratory thermometer because it
a) Has a high freezing point b) has a density c) is a liquid metal d) is silvery
e) expands evenly and proportionally when heated.
viii. In transverse waves the distance between two consecutive crest or between two
consecutive trough is called
a) Displacement b) wavelength c) velocity d) speed
ix. Speed of sound in air at normal temperature pressure(NTP)
a) 336 b)672 c)712 d)785
x. The image formed in a plane mirror is
a) Real b) inverted c) virtual and erect d) real and inverted
xi. When a ray of light enters obliquely from a rare into denser medium then the angle of
refraction is ______________angle of incidence.
a) Grater then b) smaller then c) equal to d)unrelated to
xii. According to Quantum theory of light photons are ________________.
a) Waves b) electromagnetic waves c) energy packets d) particles
xiii. Electromagnetic waves carries
a) Wave length b) frequency c) charge d) energy
xiv. The lightest particle in atom is
a) Neutron b) proton c)deuteron d) electron
xv. One mega ohm resistance is equal to ______________ohm
a) 106
b) 10-6
c)108
d)102
e)10-8
xvi. A galvanometer can be converted into an ammeter is always connected
a) In series b) in parallel c) in any way d)parallel to voltmeter
xvii. A P-type substance is formed when a semiconductor crystal is doped with
a________________ element.
a) Divalent b) tetravalent c) Pentavalent d) trivalent

3. 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. Write down the difference between each of the following with respect to definition
and formula
a) Kinetic energy and potential energy b) work and power
3. Define a machine and name six simple machines. Prove that the mechanical
advantage of an inclined plane is h/L =sinθ.
4. Define evaporation and describe the factors on which evaporation depends.
5. If 117.6 joule of heat is required to raise the temperature of 10gm of silver
through 50C, calculate the specific heat of silver.
6. Define electric field. Draw a diagram showing the electric field.
7. Calculate the kinetic energy of an object of mass 4kg moving with velocity of
10m/sec.
8. Define the following terms a) hooks law b) Archimedes principle c) transistor
9. Draw the image formed by a convex mirror and describe its characteristics (the
object may be placed at any point)
10.State Boyle’s law and Charles law and derive the general gas equation.
11.Define wheel and Axle and determine its mechanical advantage.
12.What is the current through a conductor with resistance of 10ohms when the
potential difference across it is 120volt?
13.Define galvanometer? How it is converted into ammeter?
14.Define spectrum and describe the wave of which an electromagnetic spectrum
consists?
15.State the following a) Snell’s law b) Ohms law c) Coulomb’s law
16.The focal length of a concave mirror is 10cm.where should an object to be placed
so as to get its real image magnified twice?
17.Define law of heat exchange? Also write the difference between heat and
temperature.
18.Find the formula of young Modulus with the help of Hooks law?
19.What is focal length? Draw a ray diagram showing focal length of an image?
20.What is an electric motor? Write the factors on which the speed of an electric
motor depends?

4. 21.Name two main defects of human eye. Show the defects and their correction
devices with the help of ray diagram?
22.Define the following a) real and virtual image b) alternating current and direct
current.
Section C (detail questions)
Attempt any two questions from the following. Each question carries equal
marks.
23.a) Define simple harmonic motion and explain it with an example and diagram of
a pendulum?
b) Write the two point of difference between the following i) forward bias and
reverse bias ii) beta rays and gamma rays
c) What is radar? Write down its two uses?
24.a) Define wave length and frequency? Derive the equation V= f λ
b) define the following a) Coulomb b) Daniel cell c) solenoid
c) Describe hydrogen bomb? Explain the reaction occur in this process?
25.a) Write the difference between transverse waves and longitudinal waves? Draw
a diagram showing both waves?
b) Write the difference between the following a) musical sound and noise b) rare
faction and compression
c) Write the difference between the following a) P-type and N-type substance b)
fission reaction and fusion reaction.