important questions class 10 federal board physics

important short and long questions of matric physics ssc2 federal board

1. Question Item Bank
Level: ___ _SSC-II ____
Subject:__ _Physics______
Chapter 10 : Wave Motion
Objective Part Questions.
Sr.n
o.
MCQs Options Answer
Key
Ref pg/Ref
Book/Topic
Bloom’s
Domain A B C D
1 The maximum potential energy of
vibrating mass attached to a spring is at
Equilibrium
position
Extreme
position
Between
equilibrium
and
extreme
position
All of them B PTB
Pg 3
Un
2 The product of frequency and time period
is equal to
v 1 0 λ B PTB
Pg 11
Rm
3 If the mass of bob of a simple pendulum is
doubled, its time period is
2 times 4 times 3 times Remain same D PTB
Pg 5
Ap
4 In terms of wavelength, the distance
between two neighboring nodes and anti
nodes is
λ 2λ 3λ 4λ A BTB
Pg 7
Un
5 Time period is inverse of Velocity Frequency Wave length Displacement B BTB
Pg 10
Rm
6 Bouncing back of a wave from the surface
is called
Refraction Diffraction Reflection Interference C BTB
Pg 12
Ev
7 When an object set pattern of motion in
equal intervals of time is known as
linear
motion
Vibratory
motion
Translatory
motion
Circular B BTB
Pg 2
Rm
8 when an external force is applied on
spring and then released ,spring goes back
to its equilibrium position due to
Restoring
force
Gravitational
force
Electric
force
Applied force A BTB
Pg3
An

9

In simple harmonic motion velocity of the
object is maximum at

Extreme

Mean

b/w mean
& extreme

None of these

A

BTB
Pg4

Rm
10 Types of mechanical waves are 2 3 5 4 A PTB
Pg8
Rm
11 waves produced by a vibrating body in air Transverse Longitudinal ElectromagNuclear B PTB Rm

2. are net Pg7
12 The number of waves passing through a
point is one second is called its
Time period Wavelength Frequency Speed C BTB
Pg5
Un
13 Which of the following equation gives the
relation between the wave velocity and
wavelength and frequency
V
2
= V =
2
V = 
2
 V =  D BTB
Pg7
An
14 What is the unit of spring constant? Nm
-2
Nm
-1
N
2
m
-1
N
2
m
-2
B PTB
Pg 3
Rm
15 Which of the following waves is not
electromagnetic
X- Rays Radio waves Light waves water waves C PTB
Pg 8
Un
16 Hertz is the unit of Frequency Wave length Time
period
Acceleration A BTB
Pg3
Rm
17 The apparatus used to study the
properties of waves is a
Ripple tank Optical fiber Microscope Telescope A BTB
Pg 11
Un
18 The bending of waves from their incident
path is called
Diffraction Interference Reflection Refraction A BTB
Pg 13
Rm
19 The energy of running water in the tunnel
of a dam is
K.E Chemical
Energy
P.E Heat C BTB
Pg 8
Un
20 The length of second pendulum is
approximately
1m 3m 4m 2m D PTB
Pg5
Ap
21 A vibrator dipped in to water in a ripple
tank has a frequency of 6 Hz. The
resulting wave has a wavelength of 0.02m
What is the speed of wave?
12m/s 0.12m/s 1.2m/s .012m/s B PTB
Pg 6
Rm
22 Time to complete one vibration is called. Wavelength Time period Amplitude None of these B PTB
Pg 4
Rm
23 A motorboat sailing on water produces
what kind of wave?
Electromagn
etic

Transverse

Stationary

Longitudinal

B
PTB
Pg7
Rm
24 Which of the following waves can be
transmitted through the media of solids,
liquids and gases?
Electromagn
etic

Transverse

Stationary

Longitudinal

D
BTB
Pg 8
Un
25 When water comes from more depth to
less depth, its frequency.
Increases Decreases Constant None of these B BTB
Pg 12
An

3. SubjectivePart Questions.
Sr.
No
Question Statement Marks

Solution
(Marks distribution)
Ref. pg and Ref book Bloom’s
Domain
1 Give the characteristics of SHM.

3 1+1+1 BTB pg 3 An
2 What will be the effect on time period of a
simple pendulum if we increase its length?
3 1+2 BTB pg4 Rm
3 Differentiate between longitudinal and
transverse waves.
3 1+2 BTB pg7 Un
4 A body of mass 0.5 Kg is attached to a spring
placed on a horizontal frictionless surface. If the
spring constant of this spring is 8Nm
-1
. Find the
time period of the body.
3 1.5+1.5 PTB pg 3 Rm
5 How many methods are there to transfer energy
from one place to another? Give examples of
each.
3 1+1+1 BTB pg6 Ev
6 Does frequency of the water waves depends
upon the depth?Explain.
3 1+2 BTB pg 11 Rm
7 What is stroboscope? Write its function. 3 1+2 BTB pg8 Un
8 The time period of a wave is 5 s. If the velocity of
the wave is 10m/s then what will be its
wavelength?
3 1+2 BTB pg 9 An
9 What is a restoring force? Is it reaction or action? 3 1.5+1.5 PTB pg2 Cr
10 Does the time period of the pendulum depends
upon the mass and amplitude?
3 1+2 PTB pg4 An
11 What is damping? How it reduces the vibration
of a vibratory body?
3 1+1+1 PTB pg 6 Rm
12 Derive the relation between velocity wavelength
and velocity?
3 1.5+1.5 PTB pg 9 An
13 What happened to the diffraction, if the slit
distance is nearly equal to wave length of wave?
3 3 PTB pg 13 Rm
14
What are the stationary waves? How are they
formed?
3 1.5+1.5 PTB pg 12 Rm
15 Differentiate between constructive and
destructive interference.
3 1.5+1.5 PTB pg 13 Un

4. Long Questions.
Sr.
No
Question Statement Marks

1 Explain SHM with example of simple pendulum? 6
2 describe that waves are means of energy transfer without transfer of matter. 5
3 describe properties of waves such as reflection, refraction and diffraction with the
help of ripple tank
6
4 A body of mass 0.5 Kg is attached to a spring placed on a horizontal frictionless surface. If the spring
constant of this spring is 8Nm
-1
. Find the time period of the body.
4
5 How many methods are there to transfer energy from one place to another? Give examples of each. 6
6 Explain SHM with example of mass spring system? 6
7 Derive a relationship between velocity, frequency and wavelength of a wave? 4
8 If 100 waves pass through a point of a medium in 20 seconds, what is the frequency and the time
period of the wave? If its wavelength is 6 cm, calculate the wave speed.
4
9 At one end of a ripple tank 80 cm across, a 5 Hz vibrator produces waves whose wavelength is 40
mm. Find the time the waves need to cross the tank.
4
10 What is damping? How it reduces the vibration of a vibratory body? 4



*Rm: Remembering
Un: Understanding
Ap: Applying
An: Analyzing
Ev: Evaluating
Cr: Creating

5. Question Item Bank
Level: ___ _SSC-II ____
Subject:__ _Physics______
Chapter 11 : Sound
Objective Part Questions.
Sr.n
o.
MCQs Options Answer
Key
Ref pg/Ref
Book/Topic
Bloom’s
Domain A B C D
1 Intensity of ordinary conversation is 10
-3
Wm
-2
10
-4
Wm
-2
10
-6
Wm
-2
10
-12
Wm
-2
C PTB
Pg25
Un
2 The product of frequency and wave length
is equal to
v 1 0 λ A PTB
Pg 27
Rm
3 Sound waves cannot travel through Air Water Vacuum Iron C PTB
Pg 20
Ap
4 The horn like part of the ear which can be
seen from outside is called
Outer ear Middle ear Inner ear Eardrum A BTB
Pg 22
Un
5 Time period is inverse of Velocity Frequency Wave length Displacement B BTB
Pg 24
Rm
6 Bouncing back of a wave from the surface
is called
Refraction Diffraction Reflection Interference C BTB
Pg 26
Ev
7 Intensity level of loudest sound which can
be heard without pain is
0 60db 120db 140db C BTB
Pg 25
Rm
8 Frequency of silent whistle lies between 20Hz to 2KHz 5KHz to 10
KHz
15KHz to
20KHz
20KHz to
25KHz
D BTB
Pg 31
An

9
Sound is produced by
Energy
Rotating
body
Vibrating
body

None of these

C

BTB
Pg 21

Rm
10 The intensity level of rustle of leaves

5dB 10dB 15dB 20dB B PTB
Pg 25
Rm
11 Human ear cannot hear the sound of
frequency less than
10Hz 20Hz 15Hz 5Hz B PTB
Pg 30
Rm
12 The instrument used to produce sound in Resonance Rod Tuning fork Laser C BTB Un

6. laboratory is tube Pg 21
13 The characteristic of sound waves by
which a loud and faint should can be
distinguish is called
Amplitude Vibration Frequency Loudness D BTB
Pg 24
An
14 The pitch of sound of ladies and children is High Low Medium None A PTB
Pg 25
Rm
15 Sound which has jarring effect on our ear
is called
Music Noise Both a&b None of these B PTB
Pg 28
Un
16 Hertz is the unit of Frequency Wave length Time
period
Acceleration A BTB
Pg 28
Rm
17 What is the value of speed of sound in air? 300 ms
-1
400 ms
-1
340 ms
-1
230 ms
-1
C BTB
Pg 27
Un
18 The depth of the ocean can be measured
by
compression
waves
Harmonics Reflection Ultra sound D BTB
Pg 31
Rm
19 1 Bel = _________decibel. 5 10 15 20 B BTB
Pg 23
Un
20 In which material of the following sound
wave travel fastest.
Solid Liquid Gas Plasma A PTB
Pg 21
Ap


SubjectivePart Questions.
Sr.
No
Question Statement Marks

Solution
(Marks distribution)
Ref. pg and Ref book Bloom’s
Domain
1 How is sound produced and travel? 3 1.5+1.5 BTB pg 19 An
2 Some people use silent whistle to call dogs, why? 3 3 BTB pg30 Rm
3 What is the difference between noise and
musical sound?
3 1+1+1 BTB pg29 Un
4 During a thunderstorm, an observer sees a
lightning flash. 6s later he hears the
thunder. The speed of sound is 330m/s.
approximately how far away is the
observer from the lightning.
3 3 PTB pg28 Rm
5 Name the factors on which loudness of sound
depends.
3 1+1+1 BTB pg22 Ev

7. 6 How can germs and bacteria in liquid be
destroyed?
3 3 BTB pg 31 Rm
7 A simple pendulum vibrates but it does not
produce any sound why?
3 1+2 BTB pg21 Un
8 The time frequency of a wave is 5Hz. If the
velocity of the wave is 10m/s then what will be
its wavelength?
3 3 BTB pg29 An
9 What do you understand the quality of sound? 3 3 PTB pg27 Cr
10 The sound of a gun is heard 2 seconds after its
flash is seen. Calculate the distance of gun from
the listener. The speed of sound is 340 m/s.
3 3 PTB pg26 An
11 Which waves are used for the scaling of the
teeth? Explain the method.
3 1+2 PTB pg31 Rm
12 If the tuning fork is placed on the table it
produces louder sound why?
3 1.5+1.5 PTB pg22 An
13 Why the voices of ladies and children are shrill as
compared to men?
3 1+2 PTB pg23 Rm
14 Sound produced on the sun is not heard on the
earth why?
3 3 PTB pg21 Rm
15 We see lightening first than thunder why? 3 1.5+1.5 PTB pg 24 Un

Long Questions.
Sr.
No
Question Statement Marks

1 Explain how sound is produced by vibrating sources and that sound waves require
a material medium for their propagation.
6
2 Describe the effect of change in amplitude on loudness and the effect of change in
frequency on pitch of sound.
5
3 Explain that noise is a nuisance? 6
4 What is meant by intensity level of sound derive its relation? 6
5 Explain the factors of loudness? 6
6 A student clapped his hands near a cliff and heard the echo after 5 s. What is the
distance of the cliff from the student if the speed of the sound is taken as 346 m/s ?
6
7 If at Anarkali Bazar Lahore, intensity level of sound is 80 dB, what will be the intensity
of sound there?
4

8. 8 Describe how ultrasound techniques are used in medical and industry 4
9 Identify sources of noise in their environment and suggest how such noise can be reduced to an
acceptable level.
4
10 Estimate the speed of sound in air by echo method. 4
11 Explain the use of soft materials to reduce echo sounding in classroom studies, and other public
gathering buildings.
4
12 Describe how knowledge of the properties of sound waves is applied in the design of
building with respect to acoustics.
4

*Rm: Remembering
Un: Understanding
Ap: Applying
An: Analyzing
Ev: Evaluating
Cr: Creating

9. Question Item Bank
Level : SSC-II
Subject : Physics
Chapter 12 : Geometric optics
Objective Part Questions.
Sr.
no.
MCQs Options Answer Key Ref pg/Ref
Book
Bloom’s
Domain A B C D
1 According to the law of reflection , the
angle of incidence is ________to the angle
of reflection.
Equal right angle opposite to
None of
these
A
Pg. 37/PCTB
(Punjab)
Rm
2 The rough surfaces of the objects reflect
the rays of light in
____________direction/s.
One two many
None of
these
C
Pg. 38/PCTB
(Punjab)
Rm
3 In convex mirror the size of the image is
always__________ than the object. Larger smaller both equal B
Pg. 76/
Federal
Board Book
Un
4 Concave mirror forms ___________of
images.
Virtual real both none C
Pg.
45/Blochist
an
Board Book
Un
5 _____________ is the midpoint of the
curved surface of spherical mirror.
Pole vertex both none C
Pg. 68/PCTB
(Punjab)
An
6 The focal length is related to the radius of
curvature by __________.
F=4R f=2/R F=2R f=R/2 D
Pg.39/PCTB
(Punjab)
Rm
7 Convex mirrors are also called as
_________________ mirrors.
converging diverging pole
Principal
focus
B
Pg.39/PCTB
(Punjab)
Un
8 In concave mirror the focus is __________
the mirror. Behind front of virual of under B
Pg. 75/
Federal
Board Book
Ap
9 An object is placed 6cm in front of
concave mirror that has focal length
10cm.The location of image will be
___________ of mirror.
Behind In front
On equal
distance
none A
Pg.
47/Blochist
an
Board Book
Ev
10 The bending of light as it passes from one Reflection Refraction Difraction Focal D Pg. 42/PCTB Un

10. transparent medium into another is called
______________.

lenth (Punjab)
11 Snell’s law is _________.
sin i/sin r =n sin r/sin i =n sin i/sin n =r
sin r/sin
n=i
A
Pg. 43/PCTB
(Punjab)
Un
12 The refrectiveindex has formula _____.
n=c/v n=v/c n=cv none A
Pg. 43/
PCTB
Rm
13 The lens which causes index parallel rays
to converge at a point is known as convex
or ____________.
Diverging
lens
Converging
lens
both
Only
convex
lens
B
Pg. 47/
PCTB
Un
14 The focus length is positive for
_________lens.
converging Diverging both none A
Pg. 52/
PCTB
Un
15 In simple lens camera, the distance
between lens and film is __________.
Variable fixed zero negative B
Pg.54/PCTB
(Punjab)
An
16 A converging mirror with a radius of 20 cm
creates a real image 30 cm from the
mirror. What is the object distance?
-5.0 cm -7.5 cm -15 cm -20 cm C
Pg. 64/
PCTB
Rm
17 Which type of image is produced by the
converging lens of human eye if it views a
distant object?
real, erect,
same size
real,
inverted,
diminished
virtual,
erect,
diminished
virtual,
inverted,
magnified
B
Pg.64/PCTB
(Punjab)
Rm
18 The critical angle for a beam of light
passing from water into air is 48.8
degrees. This means that all light rays with
an angle of incidence greater than this
angle will be:
Absorbed
totally
reflected
partially
reflected
and
partially
transmitted
totally
transmitte
d
B
Pg. 71/
Federal
Board Book
Un
19 The index of refraction depends on :
the focal
length
the speed
of light
the image
distance
the
object
distance
B
Pg.48/
Blochistan
Board Book
Rm
20 The iris is the coloured portion of the eye
and controls the amount of light reaching
the ______ .
retina pupil iris lens A
Pg.59/PCTB
(Punjab)
Un

11. Subjective Part Questions .
Sr.
No.
Question Statement Marks
Allc
Solution
(Marks distribution)
Ref. pg and Ref book Bloom’s
Domain
1 Describe how light is refracted through convex
lens? And draw the image formation by convex
lens?
6 Discription-4
Diagram-2
Pg.45 / PCTB
(Punjab)
Rm
2 Describe the use of spherical mirrors for safe
driving, blind turns on hilly roads,dentist mirror
3 Discription-3

Pg.36/ PCTB
(Punjab)
Ap
3 Describe the passage of light through parallel-
sided transparent material?
3 Explanation-2
Diagram-1
Pg. 68/ Federal Board
Book
An
4 draw ray diagram of compound microscope and
mention its magnifying power.
3 Explanation-1
Diagram-2
Pg.45/ PCTB
(Punjab)
Rm
5 Draw ray diagram of a telescope and mention its
magnifying power.
3 Explanation-1
Diagram-2
Pg.
48/ PCTB
(Punjab)
Rm
6 Describe the exploration of the world of micro-
organisms by using microscopes and of
distant celestial bodies by telescopes.
3 Discription-3

Pg.36/ PCTB
(Punjab)
Ap
7 Draw ray diagrams to show the formation of
images in the normal eye, a short-sighted eye
and a long-sighted eye.
3 Explanation-1
Diagram-2
Pg.45/ PCTB
(Punjab)
Rm
8 State the conditions for total internal reflection. 3 Explanation-3 Pg.
64/ Federal Board Book
Rm
9 Why or why not concave mirrors are suitable for
makeup?
3 Justification – 3 Pg.
71/ Blochistan Board
Book
Un
10 An object 30 cm tall is located 10.5 cm from a
concave mirror with focal length 16 cm. (a)
Where is the image located? (b) How high is it?
3 Data – 1
Formula-1
Solution – 1
Pg.
67/ PCTB
(Punjab)
Ev
11 The power of a convex lens is 5 D. At what
distance the object should be placed from
the lens so that its real and 2 times larger image
is formed.
4 Data – 1
Formula-1
Solution – 2
Pg.
67/ PCTB
(Punjab)
Ev
12 Why do we use refracting telescope with large
objective lens of large focal length?
3 Explanation-3 Pg.
65/ PCTB
(Punjab)
Un
13 How does a converging lens form a virtual image
of a real object? How does a diverging lens can
3 Explanation-3 Pg.
65/ PCTB
Un

12. form a real image of a real object? (Punjab)
14 Define power of a lens and its units 3 Explanation-3 Pg.
57/ PCTB
(Punjab)
Rm
15 What are optical fibres? Describe how total
internal reflection is used in light propagating
through optical fibres.
3 Explanation-1
Diagram-2
Pg. 76/ Federal Board
Book
Rm
16 What is critical angle? Derive a relationship
between the critical angle and the refractive
index of a substance
3 Explanation-3

Pg.
58/ PCTB
(Punjab)
Rm
17 How many lens are used in compound telescope?
Also write the features of a compound
telescope.How many lens are used in compound
telescope? Also write the features of a
compound telescope.
6 Explanation-6 Pg.
58/ PCTB
(Punjab)
Un
18 Describe the passage of light through a glass
prism and measure the angle of deviation.
3 Explanation-3 Pg.
56/ PCTB
(Punjab)
Cr
19 An object 10.0 cm in front of a convex mirror
forms an image 5.0 cm behind the mirror. What
is the focal length of the mirror?
3 Data – 1
Formula-1
Solution – 1
Pg.
67/ PCTB
(Punjab)
Ev
20 An object and its image in a concave mirror are of
the same height, yet inverted,when the object is
20 cm from the mirror. What is the focal length
of the mirror?
3 Data – 1
Formula-1
Solution – 1
Pg.
67/ PCTB
(Punjab)
Ev
Long Questions.
Sr.
No
Question Statement Marks

1 What is meant by refractive index of a material? How would you determine the
refractive index of a rectangular glass slab?
4
2 describe how total internal reflection is used in light propagation through optical fibres. 5
3 describe the use of optical fibres in telecommunications and medical field and state
the advantages of their use.
6
4 Describe how light is refracted through convex lens? And draw the image formation by convex lens? 4
5 Explain and draw ray diagram of simple microscope and mention its magnifying power. 6
6 Explain and draw ray diagram of compound microscope and mention its magnifying power. 6
7 Explain and draw ray diagram of a telescope and mention its magnifying power. 4

13. 8 Explain and draw ray diagrams to show the formation of images in the normal eye, a short-sighted
eye and a long-sighted eye.
6
9 What is meant by the terms nearsightedness and farsightedness? How can these
defects be corrected?
4
10 describe the use of lenses for rectifying vision defects of the human eye 6
11 Nabeela uses a concave mirror when applying makeup. The mirror has a radius of
curvature of 38 cm. (a) What is the focal length of the mirror? (b) Nabeela is
located 50 cm from the mirror. Where will her image appear? (c) Will the
image be upright or inverted?
4
12 The power of a convex lens is 5 D. At what distance the object should be placed from
the lens so that its real and 2 times larger image is formed.
4

*Rm: Remembering
Un: Understanding
Ap: Applying
An: Analyzing
Ev: Evaluating
Cr: Creating

14. Question Item Bank
Level : ___ SSC-II _ _
Subject :__Physics___ _
Chapter 13 :Electrostatic
Objective Part Questions.
Sr.
no.
MCQs Options Answer Key Ref pg/Ref
Book
Bloom’s
Domain A B C D
1 Unlike charges always _________each
other. attract repel oppose
None of
these
A
Pg. 81/
Federal
Board Book
Un
2 In gold leaf electroscope ,the rod passes
through a/an_________ that keeps the
rod in place
conductor insulator isolator
None of
these
B
Pg. 83/
Federal
Board Book
Rm
3 In gold leaf electroscope, the aluminium
foil is grounded by connecting a
_______wire
copper aluminum platinum
None of
these
A
Pg. 71/PCTB
(Punjab)
Un
4 The electroscope can also be charged by
the process of _____________
Electromegn
atism
induction conduction none C Pg. 73/PCTB Rm
5 Charles Coulomb in _____ experimentally
established the fundamental law of
electric force between two stationary
charged particles
1758 1785 1790 1795 B
Pg. 73/PCTB
(Punjab)
Rm
6 The force of attraction or repulsion
between two point charges is
___________ proportional to the product
of the magnitude of charges
directly inversly equally none A
Pg. 84/
Federal
Board Book
Un
7 If the medium between the two charges is
air, then the value of k in SI units will be
________N m
2
C
-2
.
9 ×10
8
9 ×10
-9
9 ×10
9
None C
Pg. 84/
Federal
Board Book
Rm
8 Coulomb's law is true only for point
charges whose sizes are very _______ as
compared to the distance between them.
small large far None A
Pg. 84/
Federal
Board Book
Un
9 Electric intensity being a force is a
_______ quantity.
scalar vector neutral None B
Pg. 76/PCTB
(Punjab)
Ap
10 The lines of electric fields were introduced Michael Charles Bohr Thomas A Pg. 76/PCTB Un

15. by ___________. Faraday Coulomb (Punjab)
11 Electric potential is a _______ quantity.
scalar vector neutral None A
Pg. 76/PCTB
(Punjab)
Ev
12 The SI unit of electric potential is volt
which is equal to______.
J C
-2
J C
-10
J C J C
-1
D
Pg. 76/
PCTB
Rm
13 In capacitors connected in parallel the
voltages in each capacitor is _________.
same different both None A
Pg. 77/
PCTB
Un
14 _________capacitor is an example of fixed
capacitors
paper mica both None C
Pg. 82/
PCTB
Un
15 In variable capacitors usually ______ is
used as dielectric.
space vaccum air All A Pg.82/PCTB An
16 ________capacitors are generally superior
to other types of capacitors.
fixed variable Mica Ceramic D
Pg. 83/
PCTB
Rm
17 According to Coulomb's law, what
happens to the attraction of two
oppositely charged objects as their
distance of separation increases?
increases decreases
Remains
unchanged
Cannot be
determined
B
Pg.87/PCTB
(Punjab)
Rm
18 Capacitance is defined as VC Q/V QV V/Q B Pg. 87/PCTB Un
19 Electric field lines
always cross
each other
never cross
each other
cross each
other in the
region of
strong field
cross each
other in the
region of
weak field
B
Pg.87/
PCTB
Rm
20 A positive electric charge attracts
other
positive
charge
repels other
positive
charge
attracts a
neutral
charge
repels a
neutral
charge
A
Pg.86/PCTB
(Punjab)
Un
Subjective Part Questions
Sr.
No.
Question Statement Marks
Allc
Solution
(Marks distribution)
Ref. pg and Ref book Bloom’s
Domain
1 Is electric intensity a vector quantity? What will
be its direction?
3 Explanation-2
Diagram-1
Pg.88/ Federal Board
Book
Rm
2 Briefly explain the working of an electrostatic air
cleaner.
3 Discription-3

Pg.84/ PCTB
(Punjab)
Ap
3 How would you define potential difference
between two points? Define its unit.
3 definition-2
Unit-1
Pg.87/ PCTB
(Punjab)
An
4 What is difference between variable and fixed
type capacitor?
3 Discription-3

Pg.82/ PCTB
(Punjab)
Rm

16. 5 Perhaps you have seen a gasoline truck trailing a
metal chain beneath it. What purpose does the
chain serve?
3 Discription-3

Pg.88/ PCTB
(Punjab)
Rm
6 If a high-voltage power line fell across your car
while you were in the car, why should
you not come out of the car?
3 Discription-3

Pg.36/ PCTB
(Punjab)
Ap
7 List the use of capacitors in various electrical
appliances.
3 Uses-3 Pg.82/ PCTB
(Punjab)
Rm
8 Describe one situation in which static electricity
is dangerous and the precautions taken to ensure
that static electricity is discharged safely.
3 Explanation-3 Pg.86/ PCTB
(Punjab)
Rm
9 state and explain Coulomb’s law 6 Statement-2
Explanation-2
Diagram-1
Formula-1
Pg.91/ Blochistan
Board Book
Un
10 Two point charges q1= 10 µC and q2= 5 µC are
placed at a distance of 150 cm. What will be the
Coulomb's force between them? Also find the
direction of the force
3 Data – 1
Formula-1
Solution – 1
Pg.
89/ PCTB
(Punjab)
Ev
11 A capacitor holds 0.06 coulombs of charge when
fully charged by a 9 volt battery. Calculate
capacitance of the capacitor.
4 Data – 1
Formula-1
Solution – 2
Pg.
89/ PCTB
(Punjab)
Ev
12 How much negative charge has been removed
from a positively charged electroscope, if it has a
charge of 7.5 × 10
-11
C?
3 Explanation-1
Solution – 2
Pg.
88/ PCTB
(Punjab)
Un
13 Does each capacitor carry equal charge in series
combination? Explain.
3 Explanation-3 Pg.
88/ PCTB
(Punjab)
Un
14 Derive the formula for the effective capacitance
of a number of capacitors connected in series.
6 Explanation-2
Diagram-1
Formula-3
Pg.
57/ PCTB
(Punjab)
Rm
15 Derive the formula for the effective capacitance
of a number of capacitors connected in parallel
6 Explanation-2
Diagram-1
Formula-3
Pg. 76/ Federal Board
Book
Rm
16 Describe the concept of electrostatic potential. 3 Discription-3

Pg.
78/ PCTB
(Punjab)
Rm
17 Describe the construction and working principle
of electroscope.
6 Explanation-4
Diagram-2
Pg.
68/ PCTB
Un

17. (Punjab)
18 Sketch the electric field lines for an isolated +ve
and –ve point charges
3 Diagram-3

Pg.
71/ PCTB
Cr
19 Two capacitors of capacitances 6 µF and 12 µF
are connected in parallel with a 12 V battery.
Find the equivalent capacitance of the
combination. Find the charge and the potential
difference across each capacitor.
4 Data – 1
Formula-1
Solution – 2
Pg.
89/ PCTB
(Punjab)
Ev
20 Two capacitors of capacitances 6 µF and 12 µF
are connected in series with 12V battery. Find
the equivalent capacitance of the combination.
Find the charge and the potential difference
across each capacitor.
4 Data – 1
Formula-1
Solution – 2
Pg.
89/ PCTB
(Punjab)
Ev
Long Questions.
Sr.
No
Question Statement Marks

1 describe experiments to show electrostatic charging by induction. 6
2 describe the construction and working principle of electroscope 5
3 Explain Coulomb's law of electrostatics and write its mathematical form. 6
4 derive the formula for the effective capacitance of a number of capacitors connected in series 4
5 describe one situation in which static electricity is dangerous and the precautions taken to ensure
that static electricity is discharged safely.
6
6 demonstrate that like charges repel each other and unlike charges attract each other using an
electroscope.
6
7 derive the formula for the effective capacitance of a number of capacitors connected parallel. 4
8 describe the use of electrostatic charging in spraying of paint? 6
9 explain different types of capacitors? 4
10 Describe how you would determine the nature of the charge on a body by using electroscope 6
11 Two capacitors of capacitances 6 µF and 12 µF are connected in series with 12 V
battery. Find the equivalent capacitance of the combination. Find the charge and
the potential difference across each capacitor
4
12 Two capacitors of capacitances 6 µF and 12 µF are connected in parallel with a 12 V
battery. Find the equivalent capacitance of the combination. Find the charge
and the potential difference across each capacitor.
4