Happy summer vacation

Name: ……………………....................... Class : ……… seCtion: …….. Roll no. ……..

B. K . Sr. Sec. Public school, Bawani Khera

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Respected Parents

Summer Vacation will start from 01.06.2017 to 02.07.2017 and School will reopen

on 03.07.2017 as per scheduled time-table i.e.:- 8: 00 am to 2:00 pm.

Instructions (for Students):

You are requested to fix your child time-table during vacation so that they

can do their holidays homework regularly and also enjoy the holidays.

Please arrange the relevant material which is required to prepare projects,

your word.

Please motivate your children to read good books during vacation and

please arrange the same for them.

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Note : It is compulsory for a child to be present in school from 3rd July 2017 (03 tqykbZ 2017 ls fon;ky; es cPps dk mifLFkr gksuk vfuok;Z gSA)

Physics

1. Learn the following units :

Unit -1 Electrostatics

Unit- 2 Current Electricity

Ch.- 3(a) & 3(b)

2. Complete your practical notebook.

3. Do following activities: (from your practical book)

a. To study the variation in potential drop with length for a steady current.

b. To draw the diagram of a given open circuit comprising at least a battery, resistor/

rheostat, key, ammeter, and voltmeter. Mark the components that are not

connected in proper order and correct the circuit and also the circuit diagram.

4. Write down the formulae related to the various topics (upto ch.- 3b)

5. Do atleast 8 numericals in your notebook related to the following topics:

a. Coulomb’s law in vector form

b. Superposition principle

c. Gauss’s theorem and its applications.

d. Capacitors in series and parallel.

e. Energy stored in a capacitor.

f. Series and parallel combination of resistors.

g. Kirchhoff’s laws.

h. Biot- Savart law.

i. Electric field

j. Electric potential

k. Sharing of charge in capacitor

l. Drift velocity numerical

6. Prepare any one project report on the topic as follow:

a. Vande- Graff generator.

b. Cyclotron.

7. Prepare the M.C.Q’s and viva-voce of the practicals done so far.

8. Learn NCERT question upto 3(b) unit

9. Learn all conceptual question give in all units.

Chemistry

Note: Do and learn on your behalf with good learning.

1. Define the following definitions:

a. Void

b. Close packing in two dimension

c. Space lattice

d. Paramagnetism

e. Defect

f. Packing fraction

g. Diamagnetic substance

h. Ferromagnetic substance

i. Colligative properties

j. Unit cell

k. Doping

l. Co-ordination number

m. Square close packing

n. Hexagonal close packing

o. P-type semi-conductor

p. N-type semi-conductor

q. Ferrimagnetism

2. Do any project from 1st, 2

nd and 3

rd unit

a. Lead-storage battery

b. Colligative property

c. Defects

3. Learn all questions (N.C.E.R.T) of following four units.

a. Solid state

b. Solution

c. Electro chemistry.

d. Chemical kinetics

4. Write and learn the following question (Board-Base)

a. Out of molarity and molality which one is perfered and why?

b. Silver Crystallizes with face-centred cubic unit cell. Each side of the unit cell has a

length of 409 p.m. What is the radius of an atom of silver?

c. Which point defect in crystals of a solid decrease the density of solid?

d. Write main points of difference between crystalline and Amorphous solids?

e. Calculate the packing efficiency of a metal crystal for a simple cubic lattice.

f. Define reverse osmosis. Give one use of it.

g. What are non-ideal solutions? What are their different types? Explain giving examples.

h. State Raoult’s law. Derive its mathematical expression for a solution of a non volatile

salute in a volatile solvent.

i. Write three difference between ideal and non-ideal solutions.

j. What is van’t Hoff factor? How does it help in the determination of degree of

association or degree of dissociation of a solute in solution?

k. Write the difference between electrochemical cell and electrolytic cell.

l. Explain faraday’s first and second law of electrolysis.

m. Derive the relationship for depression in freezing point.

Mathematics

1. Let S be a relation on the set R of all real numbers defined by S = {(a,b) a2 + b

2 =1}

Prove that S is not an equivalence retation on R

2. Let A=R – {2) and B = R – {1}, if f:AB is a mapping defined by f(x) =

. Show that f is

bijective.

3. Let f: NN be defined by f(n) = {

, then show that f is objective.

4. Let A = N {o} N {o} and let ‘ ’ be a binary operation on A defined by (a,b) * (c,d) = (a+c,

b+d) for all (a,b), (c,d) A show that

a) ‘*’ is commutative on A

b) ‘*’ is associative on A.

5. If

prove that

– 2xy cos +

= sin2

6. Solve the equation : - sin-1

+ sin

-1

= sin

-1 x.

7. The sales figure of two car dealers during January 2013 showed that dealer A sold 5 deluxe, 3

premium and 4 standard cars, while dealer B sold 7 deluxe, 2 premium and 3 standard cars. Total

sales over the 2 month period of January-February revealed that dealer A sold 8 deluxe, 7 premium

and 6 standard cars. In the same 2 month period, dealer B sold 10 deluxe, 5 premium and 7

standard cars. Write 2 3 matrices summarizing sales data for January and 2 month period for each

dealer.

8. Use matrix multiplication to divide Rs. 30,000 in two parts such that the total amount interest at

9% on the first part and 11% on the second part amount Rs. 3060.

9. If A = [ √

√ ], then prove by principle of mathematical induction that

An = [

√

√ ] for all n N

10. Find the trace of the matrix A=[

]

11. Find the number of all possible matrices of order 3 3 with each entry ‘0’ or ‘1’.

12. Evaluate the determinant |

|

13. If [.] denotes the greatest integer less than or equal to the real number under consideration and

-1 then find the value of the following determinant.

=|

[ ] [ ] [ ][ ] [ ] [ ][ ] [ ] [ ]

|

14. If 1 =|

| 1 = |

| , without expanding prove that 1 = 2

15. Prove that |

| = 2 abc (a+b+c)

3

16. If A (x1,y1), B (x2 , y2) and c (x3, y3) are the vertices of an equilateral triangle whose each side is

equal to ‘a’, then prove that |

|

= 3 a4

17. Find the value of |

|

18. Using elementary row transformation, find the inverse of the matrix A=[

]

19. An amount of Rs 5000 is put into three investments at the rate of interest of 6%, 7% and 8% per

annum respectively. The total annual respectively. The total annual income is Rs. 358. If the

combined income from the first two investments is Rs 70 more than the income from the third,

find the amount of each investment by matrix method.

20. Prove that the function f given by f(x) = | | is continuous but not differentiable at

‘x=3’.

21. Rivise Ch. 1 to 7 for test.

TOPIC- CONTINUITY AND DIFFERENTIABILITY Q-1 IF the function f defined by f(x)=

, x≠0 is continuous at x=0, find the value of c.

½, x=0

Q-2 Find the relationship between a and b so that the function f defined by f(x)= ax+1,if x≤3

bx+3,if x>3 is continuous at x=3

Q-3 For what values of k is the function f(x) = k(x2-2x), if x≤0 continuous at x=0?

4x+1, if x>0

Q-4 If the function f defined by f(x)= 3ax+b,if x>1

11,if x=1

5ax-2b,if x<1

is continuous at x=1 ,find the values of a and b.

Q-5 Examine the function f for continuity and derivability at x=0 where

f(x)= 1-x2,x≤0

1+x2,x>0

Q-6 Differentiate the following functions w.r.t .x

(i) y = x logx

+( log x)x (ii) y = e

sinx + ( tan x )

x (iii) y = (log x)

cosx +

Q-7 If x=sin t , y=sin pt ,prove that (1-x2)y2-xy1+p2y=0

Q-8 If √ prove that (x2+a2)y2+xy1=0

Q-9 If x= a (cost +log ( tan

)) and y= asint ,find dy/dx at t=π/4.

Q-10 If y=sin (m ), prove that (1-x2)y2-xy1+m2y=0

Subject - English (Do any four tasks)

1. Read an article from editorial page of an English Newspaper daily, write its brief idea daily in your own language. Also mention which article you liked most and why?

2. Make a project on “The Invisible Man”

3. Prepare a PPT on “Let us Heal the Earth”.

4. Prepare a documentary film on “Women Empowerment”.

5. Write a review of “The Tiger King”.

SAMPLE BOOK REVIEW

Class- 12

th Reviews

The Diary Of A Young Girl; Anne Frank by Otto Frank

Review by: ____________. School: _______________, Class: _______ The title of my independent reading book is The Diary Of Anne Frank and the author is Anne Frank but her

dad, Otto Frank, published her book right after she passed away when the war was liberated.

Generally the novel that I chose is about the start of a diary of a young teenage girl named, Anne who

describes fairly typical girlhood experiences, writing about her friendships with other girls, her crushes on

boys, and her academic performance at school, because anti-Semitic laws forced Jews into separate

schools, Anne and her older sister, Margot, attended the Jewish Lyceum in Amsterdam. The Franks had

moved to the Netherlands in the years leading up to World War II to escape persecution in Germany. After

the Germans invaded the Netherlands in 1940, the Franks were forced into hiding. With another family, the

van Daans, and an acquaintance, Mr. Dussel, they moved into a small secret annex above Otto Frank’s

office where they had stocked up with food and supplies. The employees from Otto’s firm helped hide the

Franks and kept them supplied with food, medicine, and information about the outside world. Otto Frank is

the family’s sole survivor, and he recovers Anne’s diary from Miep. He decides to fulfill Anne’s wishes by

publishing the diary.

The main character of the diary that I read is Anne Frank and she was the protagonist who had problems

with few of her fellow classmates, but most importantly the antagonist of the story was the Gestapo aka

Secret Service of the Germans. The sequence of events that lead up to the conflict of the story is based on

hiding in an annex from the Gestapo, stocking up on foods, clothes, water, and the things they need in

order for them to survive.

I chose this book because I have a passion for history and I fell in love with The Diary Of Anne Frank ever

since I first read it so it wasn’t my first time reading it.

My initial reaction towards The Diary Of Anne Frank caught my attention to the point where I was often

thinking about it even dreaming about it, in which case, I was extremely fascinated about what happened

during the holocaust era. I feel this way because ever since I read The Diary Of Anne Frank I loved history

and every little aspect about it. The Diary Of Anne Frank is the best book that I have ever read in my life

and its not compared to any other books, its different and unique.

Yes, I would recommend this book to other people to read because it will make people realize that there

really is such thing as an innocent girl who believed in the world, but ends up getting dragged with her

family to the concentration camps for force labor work and then exterminated. Anne Frank and Rachel Joy

Scott had something in common, and Rachel’s challenge caught a lot of individual’s attention by what

happened to her, well that’s how I feel about Anne Frank.

Subject – Music Hind. Vacal