HOLIDAY HOME WORK FOR SUMMER VACATIONS
CLASS – XII
SUBJECT- ENGLISH CORE
1. Collect 05 classified and 05 commercial advertisements.
2. Write one formal invitation, one informal invitation and replies for each invitation.
3.Draft/ Make/prepare five posters on social issues like Save the Girl Child, Say no to Drugs,
Save Water,Blood Donation Camp, Stop Child Labour etc.
4. Write Down the Gist of The poem, ‘My Mother At Sixty Six”.
5. Social Networking Sites are A Boon or Bane. Write an article in about 200 words.
6. Write down a brief Synopsis of The Novel “The Invisible Man”
7. Prepare a list of professional courses that are available in Delhi University, BHU, AMU,
H.N.B. Garhwal University.
ग्रीष्मावकाश कालीन गह
ृ कार्य २०१५
 यशोधर बाबू के आदशश ककशनदा हैं ,आपका आदशश कौन है ? और क्यों ?
आपके आसपास भी कई व्यक्क्ि ऐसे हो सकिे हैं जो यशोधर बाबू जैसे स्वभाव के हों | ऐसे ककसी एक
व्यक्क्ि के ववषय में ववस्िार से लिखिए |
 अपने पसंदीदा टी० वी० सीररयि के ववषय चचाश करिे हुए उसे रोचक बनाने
के दो उपाय भी लिखिए |
 ‘मोबाइि बबना िगे सब सन
ू ा’ ववषय पर एक फीचर लिखिए |
 बढ़ –चढ़ कर दावा करने वािे और भ्रामक प्रचार करने वािे ववज्ञापनों से
ग्राहकों ,उपभोक्िाओं को होने वािी परे शाननयों का उल्िेि करिे हुए ककसी
समाचार पत्र के संपादक को पत्र लिखिए | दो सझ
ु ाव भी दीक्जये |
 दस दोहों व दस चौपाइयों का संकिन कीक्जये (पाठ्य पस्
ु िक के अनिररक्ि)|
 ‘यव
ु ाओं में बढिी नशे की प्रववृ ि’ िथा ‘ककसानों की समस्याओं की अनदे िी’
ववषय पर आिेि लिखिए |
 ‘गााँव में फैििा प्रदष
ू ण’ पर आिेि लिखिए |
 ‘किकेट का बादशाह सचचन’ ववषय पर फीचर लिखिए |
 नेपाि में आए भक
ू ं प पर एक ररपोटश लिखिए |
PHYSICS
1.Fig shows three point charges +2q ,-q and +3q . What is electric flux due to this
configuration through the surface S ?
2q
3q
-q
s
2. Two point charges having equal charges separated by 1m distance experience a force
of 8 N. What will be the force experienced by them, if they are held in water at the same
distance (k=80).
3. Force of attraction between two point charges placed at a distance d
is F, what distance apart should they be kept in the same medium so
that Force between them is F/3.
4. In which orientation , a diploe placed in a uniform field is in (i) stable
(ii) unstable equilibrium ?
5. Define Electric diplole moment .Write its S.I Unit.
6. A point charge ‘q’ is placed at a point o as shown in fig . Is the potential difference
(VA-VB) positive, negative or zero if q is
i.
Positive
ii.
Negative
q
A
B
o
7. A hollow metal sphere of radius 5cm is charged such that potential on
its surface is 10 V. What is the potential at the centre of the sphere?
A parallel plate capacitor of capacitance ‘c’ is charged to a potential V.
it is then connected to another uncharged capacitor having the same
capacitance. Find out the ratio of the energy stored in the combined
system to that stored initially in the single capacitor.
8. Consider two hollow concentric sphere s1 and s2 enclosing charges 2Q
and 4Q respectively as shown in the fig.
(i)
Find out the ratio of the electric flux through them.
(ii)
How will the electric flux through the sphere s1 change if a
medium of dielectric constant Er is introduced in the space inside
s1 in place of air? Deduce the necessary expressions.
4Q
2Q
S2
S1
9. What is the work done in moving a test charge ‘q’ through a
distance of 1 cm along the equatorial axis of an electric
dipole?
10.
Show that at a point where the electric field intensity is
zero, electric potential need not be zero.
11.
Three charges –q, Q and –q are placed at equal
distances on a straight line. If the potential energy of system
of these charges is zero, then what is the ratio of Q:q
12.
Is it possible that the potential at a point is zero, while
there is finite electric field intensity at that point? Give an
example.
13.
Is it possible that the electric field 𝐸⃗
at a point is zero,
while there is a finite electric potential at that point. Give an
example.
14.
Can two equipotential surfaces intersect? Justify your
answer.
15.
Compare the electric flux in a cubical surface of side 10
cm and a spherical surface of radius 10 cm, when a change
of 5µC is enclosed by them.
16.
Two identical metal plates are given positive charges Q1
and Q2,where Q1> Q2. Find the potential difference between
them, if they are now brought together to form a parallel
plate capacitor with capacitance C.
17.
A uniformly charged rod with linear charge density λ of
length L is inserted into a hollow cubical structure of side ’L’
with constant velocity and moves out from the opposite face.
Draw the graph between flux and time.
18. Draw a graph showing the variation of potential with
2
distance from the positive charge to negative charge of
a dipole, by choosing the mid-point of the dipole as the
origin.
19. If 𝐸⃗ = 3𝑖̂ +4𝑗̂-5𝑘̂, calculate the electric flux through a
surface of area 50 units in z-x plane
20.
Suggest an arrangement of three point charges,
+q,+q, -q separated by finite distance that has zero electric
potential energy
21.
What happens to the capacitance of a capacitor when a
copper plate of thickness one third of the separation
between the plates is introduced in the capacitor?
22.
22.A parallel plate capacitor is charged and the charging
battery is then disconnected. What happens to the potential
difference and the energy of the capacitor, if the plates are
moved further apart using an insulating handle?
23.
X and Y.
Find the equivalence capacitance between
X
3 μf
24.
3 μf
What
3 μf
is
an
Y
equivalent
arrangement the shown below
capacitance
of
the
If 6V cell is connected across AD. Calculate the potential difference between B&C.
25.
Net capacitance of three identical capacitors in
series is 1μf. What will be their net capacitance if connected
in parallel?
Find the ratio of energy stored in the two configurations, if they are both connected to the same source.
26. Two conducting wires X and Y of same diameter but different material
are joined in series across a battery .If the number density of electrons
in X is twice that in Y. Find
the ratio of drift velocity of electrons in
two wires.
27. Write any two factors on which internal resistance of a cell depends .
The reading on a high resistance voltmeter ,when a cell is connected
across it ,is 2.2V.When the terminals of the cell are also connected to
a resistance of 5 Ω as shown in the circuit ,the voltmeter reading drops
to 1.8V.Find the internal resistance of the cell.
28. In the meter bridge experiment ,balance point was observed at J with
AJ=l
i.
The values of R and X were doubled and then interchanged. What
would be the new position of balance point.
ii.
If the galvanometer and battery are interchanged at the balanced
position.How will be the balance point get affected?
29. Two wires of equal length ,one of copper and the of manganium have
the same resistance. Which wire is thicker?
30.
Define relaxation time of the Free electrons drifting in a conductor
.How is it related to the drift velocity of free electrons ?Use this
relation to deduce the expression for electrical resistivity of the
material.
31. Draw a graph to show the variation of resistance R of the metallic wire
as a function of its diameter D keeping the other factor constant.
CHEMISTRY
1. Do questions of chapter 1,2,3 asked in 2013 ,2014 & 2015 board exams.
2. Select an investigating project for board exam & start working on it.
3. Do NCERT exercise & intext questions chapter 1,2,&3.
BIOLOGY
SECTION A
1 The Turkey & whiptail lizards usually produce females for several generations. How is this
possible?
2 The meiocyte of plant contains 16 chromosomes. Workout the no of the chromosomes
found its zygote & in its andosperms.
3 In the following fig. of a fruit, label the part which is protective in function & that which is
responsible for producing new plants.
4 At what stage of life is oogenesis initiated in human female? When does the oocyte
complete oogenesis? Why. Where is the egg transferred before it reaches the 8-celled stage &
what is this technique called?
6 Why is the offspring formed by asexual reproduction referred to as a clone?
7 Name the types if cross-pollination in silk cotton tree & Vallisnaria respectively.
8 Which of the blastula is destined to form the germ-layers of the developing embryo in
humans?
SECTION B
11 What is pregnancy hormone? Why is it so called? Name 2 source of this hormone in a
human female.
12 What forms the corpus luteum? Name the hormone secreted by it?
13What are the suggested reason for population explosion?
14 Write 2 differences between partrhenogenesis and parthenocarpy in plants .
15 Differentiate between geitonogamy and xenogamy.
16 Differentiate between oestrus and menstrual cycle.
17 Name 2 animals that are oviparous and viviparous.
18 How does a test cross help in identifying the genotype? Explain.
SECTION C
19 Define 1) Juvenile phase
2) Reproductive phase
3) Senescent phase
20 Trace the development of a mature ovule from a megaspore mother cell.
21 Spermatogenesis in human is a hormone regulated process. Justify.
SERCTION D
22 What is the principle behind each of the following methods of contraception?
1) Use of pills
2) Barrier method
3) Sterilization process
23 Describe the post zygotic events leading to implantation placenta formation in humans.
Mention any two functions of two placenta.
24 Describe the stages of oogenesis in human female.draw a labeled diagram of a human
ovum released after ovulation.
II Solve the question paper of the monthly test in your biology records
III Complete the project work for AISSCE 2014
BIO-TECHNOLOGY
1. To learn the techniques given and demonstrate using ppt
a. Protein finger printing
b. 2 D Electrophoresis
c. Isoelectric focusing
d. Protein engineering
e. Mass spectrometry
2. To complete the notes of chap 1.
3. Project- to search newly discovered atleast 5 proteins based products and their uses
using internet
4. To solve the monthly test paper”May” in notebook.
5. Frame 10 conceptual questions of chapter 1 taking help from last year board papers
MATHS
Write and solve 30 questions of chapters:1- Matrices
2- Determinants
3- Relation and function
WHICH ARE ASKED IN THE BOARD EXAMINATION FROM 2012 TO 2014.
INFORMATICS PRACTICES
1. Solve 10 Frame based Questions from last 10 years Board question paper.
2. Prepare a project using Java Language using Live Data as Sample Input.
COMPUTER SCIENCE
1. Solve all the CBSE Sample Papers covering the following topics done so far:



1. Revise
break:




Database concepts
SQL
Networking concept
the following C++ topics for further chapters to be covered after summer
Arrays
Functions
Structures
Flow of control
HISTORY
1. Prepare a project containing around 25 to 30 pages on any 1 topic of your syllabus
As prescribed by CBSE.[in file]
2. Solution of CBSE question given in the last five years question papers related to the
first 4 chapter
3. Solve the exercise of chapter 4th.
4. Learn all the question answers in given in first 4 chapters .
SOCIOLOGY
1. Changing nature of family in India. Survey work for board practical’s.
2. Download the last 5 year’s board exams question paper.
3. Revise the chapters for coming exams and rectify your previous mistakes.
ECONOMICS
Revision with question answer of the following chapters in the holiday home work copy:
1.
2.
3.
4.
Introduction of economics
Consumer’s equilibrium
Law of demand
Elasticity of demand
ACCOUNTS
Solve the numerical of Fundamentals of Partnership and Change in profit sharing ratio.
PROJECT FOR CLASS XII ACCOUNTANCY
Prepare Balance Sheet of A Joint Stock Company as per Revised Schedule VI of Companies
Act 2013.
Project on the Partnership Firm
BUSINESS STUDIES
Prepare all the questions and answers of Significance and Nature Of Management and
Business Environment.
Project Topic on How liberalization, Privatization and Globalization affected Indian Economy.
LIBRARY
Class – XI & XII
1. Write a report on Earth Quake in Nepal 2015 with news papers clipping etc.
2. How would your future India be - corruption free, dowry free, unemployment free,
hunger free etc.
Write a brief biographical report on Dr. B.R. Ambedkar