adnan hussain

1. AL-HUDA SCHOOL
Campus III (Boys Section)
2nd
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)
i. The emission of rays from the nucleus is called
a) Chemical process b) atomic mass c) radio-activity d) atomic dispersion
ii. Which of the following is more penetrating
a) Alpha rays b) beta rays c) gamma rays
iii. In P-type semiconductor most of current is carried by
a) Electron b) proton c) holes
iv. A radio wave is produced by a _________________alternating current.
a) Low frequency b) high frequency c) audio frequency
v. The relationship between electric current and the magnetic field was discovered by
a) Newton b) Faraday c) Fleming d) Oersted
vi. If the quantity of charge on each of the two bodies is doubled, the force between
them becomes
a) Twice b) four times c) nine times d) sixteen times
vii. The substance which is used as a medium between the plated of the capacitor is
called
a) Conductor b) semiconductor c) dielectric d) electrolytes
viii. We use _____________to disperse white light into different colours.
a) Convex mirror b) prism c) convex lens d) concave mirror
ix. Which one of the following is not electromagnetic in nature?
a) Infrared rays b) ultra-violet rays c) radar waves d) sound waves
x. For total internal reflection the angle of incidence must be __________then critical
angle.
a) Greater then b) smaller then c) equal to d) unrelated to

2. xi. The objective of a refracting telescope is a
a) Double convex lens b) convex mirror c) plane mirror d) concave mirror
xii. The image formed in a plane mirror is
a) Real b) inverted c) virtual and erect d) real and inverted
xiii. If frequency of waves f= 30cycles/sec and waves length =0.2 meter then the velocity
of the wave is
a) 6 b)150 c)0.0066 d)8
xiv. The reason for bursting water pipes during very cold weather is that
a) Water pipes contract when cooled b) water expand on freezing c) ice Expand on
melting d) the structure of the material of the pipe is weakened at low
temperature
xv. Archimedes principle is applied to determine
a) Specific heat b) specific gravity c) specific resistance
xvi. The ability to do work is called
a) Potential energy b) work c) energy d) electric energy
xvii. The unit of power is
a) Work b)joule c) watt d)volt

3. SECTION „B‟ (SHORTH – ANSWER QUESTIONS)
Time: 2 ½ Hours Max. Marks: (42)
Note:Answer any 14 questions from this section. No answer should exceed 3 to 5
sentences.
1. With the help of a labeled diagram explain the working of electric bell.
2. Steam produces more severe burns on the body than the hot water (give scientific reason)
3. What is the kinetic energy of a 200kg car is travelling with the velocity of 36km/hr.
4. A body kept at a distance of 10cm from a concave mirror the radius of curvature of the
mirror is 10cm, find the position and nature of the image.
5. Define photon and write the two of its characteristics.
6. Define loudness of sound. Give three factors on which it depends.
7. Define simple harmonic motion in case of mass attached to a spring.
8. Write three advantages of transistor.
9. Write two points of difference between the following a) alpha rays and beta rays b)
reflection and refraction.
10.When a sound wave of frequency 200Hz and wave length 3m passes through a medium
calculate the velocity of the wave in that medium.
11.Define the following a) time period b) amplitude c) doping
12.Define radio isotopes and write any three uses of radio isotopes.
13.Write the four uses of spherical mirror.
14.Why a concave lens is suitable focal length used to remove short sightedness of the eye?
(Give scientific reason).
15.Define the following a) farad b) critical angle c) refractive index
16.Find the current passing through the heater which has a resistance of 20 ohm and potential
difference of 220V is applied.
17.Define P-type and N-type substances. Give example also?
18.The sound of a thunder in the sky is heard later then a streak of light although they are
produced at the same time. (give scientific reason)
19.State three characteristics of musical sound and describe any one of them.
20.Define the following a) Co-efficient of linear expansion b) specific heat capacity c) latent
heat of fusion
21.Define total internal reflection with the help of a ray diagram and write down the two
conditions necessary for it.
22.Write the difference between the following a) regular and irregular reflection b) ammeter
and galvanometer.
Section C (detail questions)
Attempt any two questions from the following. Each question carries equal
marks. (28)
23. a) Draw a neat labeled ray diagram of simple microscope. Write down the characteristics
of the image formed by it and the formula of its magnifying power.
b) Define reflection and write two laws of reflection. Draw a diagram showing the reflection
of light?
c) State Archimedes Principle? Give an example and also give one application?
24.a) Define kinetic energy and derive the equation K.E=1/2 mv2
?
b) Define the following terms a) Nuclear reactor b) series connection c) parallel connection
d) ammeter.
c) Explain electromagnetic spectrum and explain the waves range created by
electromagnetic spectrum?
25.a) define the following terms a) conductor b) insulator c)nature of current d) resistance
b) Explain the relation between electrical energy and joule law.
c) Explain radioactivity? Write its type in detail? Draw a diagram showing the radioactivity.