Kendriya Vidyalaya AFS Sec-14 Gurgaon SUMMER BREAK HOLIDAYS HOMEWORK

CLASS XII Session 2014-15

(PHYSICS) XII-A, B, C

1) Draw electric field lines for:

i) Charge q>0

ii) q<0

iii) Two equal and opposite charges.

iv) Two equal and similar charges.

2). Calculate the equivalent capacitance between the points A and B in the combination shown below:

A C1 C2 C3 C4 B

Given C1= 5μF; C2= 10μF ; C3= 15μF; C4=30Μf 3). Calculate the work done in rotating an electric dipole

90o

to an angle .

4). State Gauss’ law in electrostatics. Find electric field due to infinitely charged long straight

uniformly charged wire of linear charge density at a given point using Gauss’ law. Draw ‘E’ vs

distance.

5). Find electric field at a point due to uniformly charged infinite plane sheet with surface charge

density ‘σ’. Draw ‘E’ vs distance from sheet.

6). Derive the expression for an electric field due to an electric dipole at a point on equatorial line.

7). Show that the energy stored in a parallel plate capacitor is ½ CV2. Hence derive the expression for

energy density.

8. Obtain the equivalent capacitance of the network in Fig. 2.35. For a 300 V supply, determine the

charge and voltage across

each capacitor.

9.( a) In a metre bridge [see

NCERT Fig. 3.27], the

balance point is found to be

at 39.5 cm from the end A,

when the resistor Y is of

12.5 Ω. Determine the

resistance of X. Why are the

connections between resistors in a Wheatstone or meter bridge made of thick copper strips?

(b) Determine the balance point of the bridge above if X and Y are interchanged.

(c) What happens if the galvanometer and cell are interchanged at the balance point of the

bridge? Would the galvanometer show any current? 10.) NCERT Exercise problem no.1.8

11.) NCERT Exercise problem no.1.18

12). NCERT Exercise problem no.1.26

.

13.) Derive an expression for the potential energy of a dipole in a uniform electric field .

Discuss the conditions of stable and unstable equilibrium.

Current Electricity

14). Draw the variation of resistivity with temperature for (i) Metals (ii) semiconductors

and (iii) alloys.

15). What is change in resistivity of a conductor when it is (i) cut into half (ii) stretched to

twice its length?

16). Draw the circuit diagram for determining the internal resistance of primary cell using

potentiometer. Write the formula used.

17). V- I graph of two metallic wires of same length and cross sectional area are given

below. Which of these has higher resistance?

18). In a meter bridge, the null point is found at a distance of 40 cm from A. If a resistance

of 12 is connected in parallel with S, the null point occurs at 50.0 cm from A.

Determine the values of R and S.

A

B

V

I

19). Determine the current in each branch of the network shown in fig 3.30:

…………………………………..

20).Figure 3.35 shows a 2.0 V

potentiometer used for the

determination of internal resistance of

a 1.5 V cell. The balance point of the

cell in open circuit is 76.3 cm. When a

resistor of 9.5 Ω is used in the

external circuit of the cell, the balance

point shifts to 64.8 cm length of the

potentiometer wire. Determine the

internal resistance of the cell.

CHEMISTRY

VALUE ADDED QUESTIONS UNIT-2-SOLUTION

1)The chairman, Kandla (Gujrat) port due to water scarcity has decided to desalinate sea water to obtain potable water. a. As a student of chemistry which method will be suitable to use? b. Discuss the method. c. What value have you inculcated in using this method?

2) Bharath went to his grandfather’s house in winter this year. As usual he went for fishing. His grandmother told him there will be no fishes in the lake. He noticed that it was more difficult to find fishes in winter. The fishes were deep inside the river. Whereas in summer they were on the surface and hence he was able to catch fishes. a) Why are fishes on the surface in water than in the depth in summer?

b) What value can be derived from this? 3) Shubham’s father is suffering from high blood pressure. Shubham’s mother cooks food with

very little salt in it. a. Why? b. Doctor did not advise him not to consume salt at all. Why? c. What value do you get from this? 4) Srisha wanted to keep ice creams without melting. So he had to keep it on ice taken in a

container. His grandmother advised him to pour salt on the ice. a. Why? b. What is the value in this? 5) Sneha’s grandmother lives in Simla. In winter there is lot of snow in front of the house. She

asked Sneha to clear the snow from the front of the house. Sneha added salt to snow to clear it.

a. Why? b. What is the value in this? 6) Scuba divers when come towards the surface, the pressure gradually decreases resulting in

the released of dissolved gases leading to formation of bubbles of nitrogen gas in the blood which blocks the capillaries and thus harmful kinds are created. To avoid bends and toxic effects of high concn of nitrogen gas, the air is diluted with helium. After reading the above passage, answer the following questions.

i) Why is the harmful condition of bends overcome by the use of helium. ii) Which law is used to calculate the concentration of gases in solution. iii) Mention the value associated with providing divers air diluted with helium. 7) Ram takes a open pan to cook vegetables at a hill station while shyam cook the same

vegetables in a pressure cooker at the same place. (a) Explain with reason who will cook vegetable faster. (b) Mention the reason for the delay in cooking. (c) Which value is learnt by the student in the process of cooking food in the pressure cooker. UNIT-3 Q 1) In Apollo Space programs, hydrogen-oxygen fuel cell was used. (a) Explain why, fuel cell is preferred in space programme.? (b) Mention the values associated with the decision of using fuel cell? Q 2) Ira a student of science went with her grandfather to buy a battery for their inverter and

camera. They found two types of batteries, one a lead storage battery and other a Nickel-Cadmium storage battery. Later was more expensive but lighter in weight. Ira insisted to purchase costlier Nickels-Cadmium battery.

(a) In your opinion, why Ira insisted for Nickel-Cadmium battery? Give reasons (b) Write the values associated with above decision?

Q 3) People are advised to limit the use of fossil fuels resulting in Green House Effect leading to a rise in the temperature of earth. Hydrogen provides an ideal alternative and its combustion in fuel cells.

1. White electrode reaction in H2-O2 fuel cell. 2. How is green house effect reduced by the use of fuel cells? 3. Write the values associated with preference of using fuel cells to fossil fuel. Solve the class test questions of unit 1 and 2 in H.W copy. VARIOUS VALES ASSOCIATED Critical thinking and self awareness, Energy conservation, Water conservation, Critical thinking & problem analysis, Environmental conservation,Social responsibility, Inclusion and dignity of individual, Self awareness and decision making, Critical thinking and decision making, Social responsibility and social justice, Appreciation of cultural values and dignity of individual, Interplay of different cultures., Principle of equality and social justice, Scientific attitude,Water and Environmental conservation, Self awareness, Social justice, awareness, respect for diversity, Inclusion, Critical thinking and decision making., respect of multireligious and multicultural country, Self awareness, Dignity of individual, Principle of equality and social justice

(COMPUTER SCIENCE) CLASS XII A

1. What is the difference between object oriented programming and procedural

programming? And also explain How does OOP overcome the shortcomings of traditional programming approaches?

2. Reusability of classes is one of the major properties of OOP. How is it

implemented in C++? 3. How is matching done in case of function overloading?

4. When should default arguments be preferred over function overloading and vice-versa?

5. When will you make a function inline and why?

6. Find the output of following code fragment:- void main()

{ int r, x, y, r1; clrscr(); cout<<”Enter any two Numbers :->”;

cin>>x>>y; r=1; r1=0; while (r!=0)

{ r=x%y; r1=y/x;

y=x; x=r;

}

cout<<”OUTPUT is:->”<<r1; } Suppose the inputs entered by the user are: -> 50, 75.

7. Find out the errors if any, in the following code:- #include<iostram.h>

void main()

{ int a,b,c; c=div(a,b) cout<<c;

} int div(int x, int y)

{ x=x+y; y=y+y;

retutn(x,y);

} 8. Find the output of the following program:

#include <iostream.h> #include <ctype.h> void Encrypt(char T[ ])

{ for (int i=0;T[i]!='\0';i+=2) if (T[i]=='A' || T[i]=='E' || T[i]='I' || T[i]='O' || T[i]='U')

T[i]=tolower(T[i]);

else if (islower(T[i])) T[i]=toupper(T[i]);

else T[i]='@'; }

void main() {char Text[]="Please SaVE EArtH";//These three words are separated by single space

Encrypt(Text); cout<<Text<<endl; }

9. Study the following program and select the possible output from it with reason:- #include<iostream.h>

#include<stdlib.h> const int MAX=4; void main()

{ randomize(); int Number; Number=52+random (random(MAX));

for(int P=Number; P>=50; P--) cout<<P<<”#”;

cout<<endl; } i. 52#53#54#55# ii. 50#49#48#

iii. 53#52#51#50# iv. 51#50#49#

10. Define a class Teacher with the following specification: Private members:

Name 20 Characters

Subject 10 Characters

Basic, DA, HRA float

Salary float

Calculate() function which computes the salary and returns it. Salary is sum of Basic, DA, and HRA. And also calculate

DA as 57% of Basic and HRA as 30% of Basic. Public members:

Constructor to assign Name as “Null”, Subject as English and Basic, DA, HRA, Salary as 0.0.

ReadData() function which accepts the data values and invoke the function Calculate().

DisplayData() function which prints the data on the screen. 11. Define a class Housing with the following specification:

a. Private members: i. Name 20 Characters ii. Type Character

iii. Cost float iv. Reg_no integer (range 10-1000)

b. Public members:

ReadData() function to read an object of Housing type.

DisplayData() function which prints the details of an object.

Function Draw_nos() to chose and display the details of two houses selected

randomly from an array of ten objects of type Housing. Use random function to generate the registration numbers to match with Reg_no from the array.

12. What do you mean by Polymorphism? Illustrate its example in C++. 13. Answer the questions (i) to (iv) given below:-

class Inventory { char Icode[10];

char Iname[20];

float price; public: Inventory()//function1

{ strcpy (Icode, “C1001” ); strcpy(Iname, “Pen”);

price = 30;

cout<<“Inventory Purchased” ; }

Inventory(char *s, char *n, float p)//function2 { ____________ ____________

____________ cout<<“Inventory Purchased” ;

}

Inventory(Inventory &p)//function3 { ____________

____________ ____________

cout<<“Inventory Purchased” ;

} ~Inventory()//function4

{ cout<<“Inventory Delivered” ; } };

(i) Name the specific features of class shown by Function 1 and Function2, Function3 &

Function4 in the above example.

(ii) How would Function 1 and Function 4 get executed?

(iii) Complete the definitions of function2 & function 3.

(iv) Write the calling statements of Function2 & function 3.

14. Answer the questions (i) to (iv) based on the following code : class Capsule { char Category[20];

char Date_of_manufacture[10]; char Company[25];

float cost; public:

Capsule();

void entercapsuledetails( ); void showcapsuledetails( );

};

class Tablet { protected:

char tablet_name[25]; char Volume_label[10]; public:

float Price; Tablet();

void entertabletdetails( ); void showtabletdetails( );

};

class PainReliever : public Tablet, private Capsule { int Dosage_units;

char Side_effects[20];

int Use_within_days; public:

PainReliever(); void enterdetails( ); void showdetails( );

}; (i) How many bytes will be required by objects of classes PainReliever and Tablet respectively?

(ii) Write names of all the members which are accessible from the object of class PainReliever.

(iii) Write the name of the type of inheritance? (iv) Write names of all the members which are accessible from member function class PainReliever.

(v) Write names of all the members of class Capsule which are accessible from member function of class PainReliever.

15. Write a program to count the no. of vowels in a given line of text from a text file and also write in a text file some lines of code.

16. Review Chapters 1-7 and chap-14. 17. Prepare the Project on the Topic Assigned in class in C++ and submit in CD. 18. A test will be conducted of chapters 1 to 7,14 on 4th week of June 2014.

19. Do Summer Holiday Home work in H.W. Notebook and submit it and project also on 24th June 2014.

For Himani only of CLASS XII A (INFORMATICS PRACTICES)

1. Complete & Revise Chapters 1-9. 2. Prepare the Practical File on the Topic Assigned in class in Java Net Beans and

submit in CD. 3. Prepare the Project on the Topic Assigned in class in Java Net Beans and

submit in CD.

4. A test will be conducted of chapters 1 to 9 on 4th week of June 2014. 5. Do Summer Holiday Home work in H.W. Notebook and submit it and project

also on 24th June 2014.

TEACHER ASHU ANEJA

COMMERCE

Class: XII-D AND XII-E Subject: Business

studies 1-Prepare VSA, SA, LA , Hots & Value based quotations from chapter 1 to

chapter 4.

A test will be conducted on re-opening of vidhyalaya after the summer

vacation.

Watch one business news daily [CNBC channel, Zee business],and

maintain a date wise record of the same.

Read the ‘buisness news’ section of the newspaper daily. Take out

newspaper cutouts of news relating to the curriculum.

Read business magazines , visit websites covering business informations,

download business related videos to your curriculum.

The idea is to build a ‘KNOWLEDGE BANK’ containing business

news/information.

Accountancy (T.S.Grewal) XII-D Chapter 1. Fundamental Page 5.28

Question 1, 2, 3, 4, 6, 7, 8.

Past Adjustments

Question 9, 10, 11, 12, 13, 15, 17, 20, 21.

Guaranty

Question 22, 24, 25, 28.

Goodwill 1, 2, 3.

Change In Profit Sharing Ratio

Question 1, 2, 3, 4.

New Profit Sharing Ratio

Question 2, 3, 5, 6.

Treatment Of Goodwill

Question 11, 12, 16, 18, 19.

Partner’s Capital Account, Revaluation and Balance Sheet

Question 21, 22, 23, 25, 27, 29, 31, 34, 38, 39.

Accountancy (D.K. Goel) (XII-E)

Chapter – 1

Page 1.102 Question 69

Page 1.24 Illustration 13, 31, 36, 37, 38, 42, 45, 49, 53,

58.

Chapter – 2

Page 2.13 Illustration 12

Page 2.39 Question 2, 4, 7, 8, 9, 14, 25.

Page 2.55 Question 46, 47.

Chapter-3

ILLUSTRATION – 4 QUESTION 2

Page 3.18 Illustration 20, 23, 31, 40, 41, 44, 49, 59, 60,

61.

Page 3.111 Question 34, 56, 73, 77, 85, 91, 108.

HUMANITIES

POLITICAL SCIENCE-XII 2014-2015

1. Explain these topics.

2. Kashmir problem (Princely state)

3. Green revolution& Operation Flood.

4. Major opposition parties in first three general election.

5. India”s relation with Russia before& after cold war.

6. Non-aligned movement.

7. Prepare exhibits for sst exhibition.

(GEOGRAPHY) REVISION WORK TEXTBOOK: INDIA PEOPLE AND ECONOMY.

1. POPULATION: DISTRIBUTION, DENSITY, GROWTH AND COMPOSITION.

2. MIGRATION: TYPES, CAUSES AND CONSEQUENCES.

3. HUMAN DEVELOPMENT.

4. HUMAN SETTLEMENT

5. LAND RESOURCES AND AGRICULTURE.

6. WATER RESOURCES.

PREPARE A PROJECT FOR SOCIAL SCIENCE EXHIBITION WHICH IS GIVEN TO

YOU.

-Mr. B.S. RANA

History

Class 12th I.) Passage base question one from each lesson of part I.

1.) Page 18(evidence of an invasion)

1. What is deadman lane ?

2. What information was given by R.E.M Wheeler?

3. The latest information of harappan has changed the ideology. Explain?

4. According to Rigveda what is the meaning of the term “pur”?

2.) Page 41(Prabhavati Gupta and the village of Danguna)

1. What has been stated by Prabhavati Gupta in her inscription?

2. What was donated by her to the fortnight of Karttika?

3. What was the exemptions from which the villagers were free?

4. By whom and when this was engraved?

3.) Page 57 (why kinfolk quarrellled)

1. From where this excerpt has been taken?

2. Who was kauravas and pandavas?

3. What Duryodhana said to his father and addressed?

4. What was the thinking of those people who wrote this epic?

4.) Page 94 (Rules for monks and nuns)

1. From which Buddhist text these rules are found?

2. What should be the conduct of monks and nuns?

3. Can you explain why these rules were formed?

4. What is the proper course?

II.) MAP WORK

1. Page 2 locate the well-developed cities of harappan culture (any 8)

2. Page 3 locate areas of early harappan occupation

3. Page 30 early states and capitals –

taxila,Magdha,Kuru,Panchala,Koshala,Kashi,Vajji and Avanti.

4. Page 33 distribution of Asokan inscriptions

Major-Mansehra,Shahbazgarhi,Kandhar,Kalsi,Girnar,Sopara,Sannati

Pillor Inscriptions-Sanchi,Meerut,Sarnath,Kaushambi,Lauriya Nandangarh

5. Page 43 some important towns and states

TOWNS- Taxila,Mathura,Kaushambi,Vaishali,Patliputra

STATES-Kushanas,Shakas,Cheras,Cholas,Pandayas,Satvahans

6. Page 95 major Buddhist sites-Lumbini,Sarnath,Sanchi,Ajanta,Amaravati

III.) Preparation of project list/index group wise-as 4 students are in each group (BOOK I)

IV.) There will be a 60 marks test on 30.06.2014 and the question paper will be on board

pattern.

QUESTION BANK HOLIDAY HOMEWORK

CLASS 12TH

(ECONOMICS)

UNIT 1: INTRODUCTION

Q1.What are the various economic problems? Briefly explain the reasons of these problems.

Q2.Differentiate between a)market economy and centrally planned economy b)micro economic and

macro economics.

Q3.What do you mean by PPC? Why is it concave to the origin?

Q4.Briefly explain the concept of opportunity cost with example.

UNIT 2: CONSUMER EQUILIBRIUM AND DEMAND

Q1.Briefly explain the various terms a)TU b)MU c)budget set d)budget line e)utility.

Q2.What is the relation between a)TU and MU b)TP, AP and MP c)AC and MC d)AR and MR with

diagram ?

Q3.Briefly explain the Law of DMU with schedule and diagram.

Q4.Consumer equilibrium conditions in case of single commodity/double commodities with schedule and

diagram with utility approach.

Q5.Consumer equilibrium with IC approach by schedule and diagram.

Q6.Briefly explain the determinants of demand.

Q7.What is demand function? Briefly explain individual demand function and market demand function.

Q8.Differentiate between movement along the demand curve and shift in demand curve.

Q9.What is elasticity of demand ?Briefly explain how it can be measured by a)Proportionate method

b)Total expenditure method c)Geometric method.

Q10.Briefly explain any 6 Factors affecting elasticity of demand.

Q11.Briefly explain the Law of variable Proportion with schedule and diagram. Explain with TP and MP

approach.

Q12.Reasons for operating of three phases of Law of variable Proportion.

MATHS

Relation & function Q1- Let f:={2,3,4,5}->{3,4,5,9},g:{3,4,5,9}->{7,11,15} be defined as

f(2)=3,f(3)=4,f(4)=5 and g(3)=g(4)=7,g(5)=g(9)=11 find gof.

Q2- Let f(x)=IxI and g(x)=[x], evaluate fog (-5/3)-gof(-5/3).

Q3-If f(x)=5x+3/4x-5 , show that f(f(x)) is an identity element.

Q4-Let * be a binary operation defined by a*b=3a+4b-2, Find 4*5

Q5-Show that relation R defined by R={(a,b): a-b is divisible by 3 :

a,b belongs to N} is an equivalence relation

Q6-Let A={1,3,5} B={9,11} and let R={(a,b) belongs to AxB : a-b is

odd}

Q7-Find if the binary operation * given by a*b = a-b on Z+ in binary?

Chech the commutativity & accociativity if * also.

Q8-Let f:RR as f(x) = 2x-3 and g: RR as g(x)=x+3/2,show that

fog = Ir=gof

Q9-Let f:RR as f(x) =3x+2 , show that f is invertible and find f

inverse

Q10-If f(x) = 4x+3/6x-4 ,show that fof is an identity function. What is

the inverse of f?

Q11-Let A = N x N and * be a binary operation defined on A b (a,b) *

(c,d) = (ac,bd).Show that * is commutative and associative , find the

identity element if any in A

?

Q12-Let f be exponential function and g be logarithmic function, then

find (f+g)(1)?

Trigonometric Function Chapter 2 Q1-Find the value of cos inverse ½ + 2sin inverse (-½)

Q2-Show that sin inverse 3/5 – sin inverse8/17=cos inverse 84/85

Q3-Prove that cos inverse12/13 + sin inverse 3/5=sin inverse 56/65

Q4-Find the value of tan (sin inverse 3/5+cot inverse 3/2)

Q5-Solve for x: tan inverse 2x + tan inverse 3x =pi/4

ENGLISH

1.Reading project –read 2 good novels

In the files – about the author

Summary

Main characters

Review

Your personal views