SANT NIRANKARI PUBLIC SCHOOL

MATHEMATICS

ASSIGNMENT 1 (WEEK 1) CLASS XI

MATHEMATICS

ASSIGNMENT 2 (WEEK1) CLASS XI

WEEK I ASSIGNMENT I(ECONOMICS)

Q1. What is meant by price elasticity of demand? Q2. Draw a demand curve with unitary price elasticity. Q3. When is the demand for a commodity called perfectly elastic? Q4. What is elastic demand? Q5. What is inelastic demand? Q6. Draw a perfectly inelastic demand curve. Q7. What will be the value of elasticity of demand if the demand curve is a vertical line parallel to the y-axis? Q8. A 10% increase in price leads to a 20% fall in quantity demanded. What is the value of price elasticity of demand? Q9. When is demand unitary elastic? Q10. State one factor that affects the magnitude of price elasticity of demand. Q11.A consumer buys 40 units of a good at a price of Rs. 4/- per unit. When price rises to Rs. 5/-per unit he buys 30 units. Comment on the price elasticity of demand by the total expenditure method. Q12.A consumer buys 2,000 units of a good at a price of Rs. 10/- per unit. When the price falls he buys 2,500 units. If price elasticity of demand is -2, what is the new price? Q13. A consumer buys 10 units of a good at a price of Rs. 4/- per unit. When price falls by Rs 1/-per unit, he buys 20 units. Calculate the price elasticity of demand. Q14. Draw demand curves showing price elasticity of demand equal to (i) unity (ii) infinity (iii) zero. Q15. At a price of Rs. 20/- per unit the quantity demanded of a commodity is 400 units. If the price falls by 10%, its quantity demanded rises by 90 units. Calculate its price elasticity of demand.

ASSIGNMENT II

Q1.What is the value of elasticity of demand on a rectangular hyperbola demand curve? Q2 An increase in price leads to a fall in the expenditure on the commodity. What can be said about the price elasticity of demand of the commodity? Q3. A decrease in price leads to a fall in the expenditure on the commodity. What can be said about the price elasticity of demand of the commodity? Q4. Is the elasticity of demand equal at all points on a straight line demand curve? Give reasons. Q5.A consumer spends Rs. 250/- on a good when its price is Rs. 10/- per unit. When the price rises to Rs. 11/- per unit, he spends Rs. 240/-. Calculate the price elasticity by the percentage method. Q6. As a result of a 10% fall in the price of a good, its demand rises from 200 to 240 units. Find out the price elasticity of demand. Is its demand elastic? Q7. Price elasticity of demand of a good is (-)2. 100 units of this good are bought at a price of Rs. 10/- a unit. How many units will be bought at a price of Rs 11/- per unit?

Q8. The slope of a demand curve is -0.4, calculate is the elasticity of demand, if at an initial price of Rs. 5/- per unit, the initial quantity demanded was 20 units of the commodity. Q9.Suppose the price elasticity of demand for a good is -0.2. if there is a 5 per cent increase in the price of the good, by what percentage will the demand for the good go down. Q10. Explain 3 factors affecting elasticity of demand. WEEK II

WORKSHEET1 [AUGUST]

CLASS XI BIOLOGY [CELL DIVISON AND CELL CYCLE]

WEEK1

1. Write difference between zygotene and pachytene?

2. Draw a labeled diagram of Anaphase.

3. Draw a labeled diagram of Metaphase.

4. Write any two significance of mitosis?

5. Two events occur during S – phase in animal cells. DNA replication

and duplication of centriole. In which parts of the cell do events

occur?

6. Comment on the statement “Meiosis enables the conservation of

specific chromosome number of each species even though the

process actually results in reduction of chromosome number

7. How does cytokinesis in plant cells differ from that in the animal

cells?

8. Write a note on S – phase?

9. 11.Mention the significance of cell cycle

10. Mention different sub-stages of prophase-1 of meiosis? cycle?

11. Give the key features of meiosis?

12. Mention the phases of mitosis?

13. List the features of diakinesis

14. Give the sequence of events occurring during prophase of mitosis

and meiosis.

15. Write the characteristics of metaphase of M phase ?

16. .Differentiate between Meiosis-1 and meiosis-2..

WORKSHEET 2 [AUGUST]

CLASS XI BIOLOGY[CELL DIVISON AND CELL CYCLE] WEEK 1

17. Q1. Telophase is the reverse of prophase. Elucidate the

statement.

18. Q2. Describe the different phases of meiotic prophase – I.

Mention the chromosomal events during each stage.

19. Q3.State differences between the events of meiosis and mitosis.

20. Q4. Explain:

21. a) Synaptonemal complex

22. b) Metaphase plate

23. Q5.Write the phases of the cell cycle against each of the events

24. a) The disintegration of the nuclear membrane

25. b) The appearance of the nucleolus

26. c) Division of centromere

27. d) Replication of DNA

28. Q6. List differences between mitosis and meiosis

29. Q7.What is the importance of chromosome replication during

interphase.

30. Q8.Describe various phases of mitosis

31. Q9. Explain various phases of meiosis II

32. Q10. Explain the significance of meiosis.

XI - ENGLISH

Worksheet- 1 (Aug: Week-1)

Q1 Answer the following question in about 120-150 words-

a) What do you know about Nek Chand and his work? Write giving examples.

b) “ Such short stories played an important part in China’s classical education.”

Write any one of the stories that has been referred to here.

Q2 Read the following questions and answer by selecting the appropriate

option .

i) Wu Daozi lived in ………..

a)1st Century b)4th century c)5th century d) 8th Century

ii) His last painting was a landscape commissioned by:……

a) minister b)emperor c) soldier d) friend

iii) The painter referred to a cave where, lived a ……..

a) Spirit b)birds c)devil d) angel

iv)The Emperor look astonished as the painting disappeared from the ……

a) wall b)floor c) ceiling d) cardboard

v) Quinten was a …..

a)cobbler b)goldsmith c) blacksmith d) emperor

vi) Shanshui literally means….

a) mountain water b)tap water c)river water d)water

vii) Rock garden is at…….

a)Agra b)Chandigarh c)Mathura d ) Orissa

viii) Who is the author of ‘Landscape of the soul’?

a) Khushwant Singh (b)Ted Hughes c) Nathalie Trouveroy d) William

Wordswoth

ix). What was Wu Daozi’s last painting ?

a)a painting of a landscape (c) a painting of a woman

(b) a painting of a fly (d) a painting of a wall

ENGLISH : Worksheet 2 (Aug: Week-1)

Class-XI

Q1Answer the following questions in about 30-40 words each:

a) What is shanshui? How does it express the concept of the word ‘landscape’?

b) What wonderful tale is told about the Chinese painter Wu Daozi?

c) What does the European story about Quinten Metsys illustrate?

d) Bring out, in brief, the contrast between European Art and Chinese Art?

e) How did Quinten Metsys impress the painter and achieved his goal?

f) What happened when Wu Daozi clapped his hands?

g) ‘Let me show the way’, said Wu Daozi .Explain how the author interprets the

word ‘way’?

h) What is the importance of man between Yang and Yin?

i) What is the importance of unpainted white space in Chinese painting and

landscape?

j) Who is hailed as India’s biggest contributer to outsider art?

PHYSICS WORKSHEET 1 [ August ] [ WEEK 1 ]

CLASS XI TOPIC : FORCE AND LAWS OF MOTION Q.1.The ceiling of a long hall is 25 m high. What is the maximum horizontal distance

that a ball thrown with the speed of 40 ms -1 can go without hitting the ceiling of the

hall?

Q.2.State the laws of limiting friction.

Q.3.A man weighs 70 kg . He stands on a weighing scale in a lift which is moving:-

(a) upwards with a uniform speed of 10 m/s

(b) Downwards with a uniform acceleration of 5 m/s2 .

(c) upwards with a uniform acceleration of 5 ms-2.

What would be the readings on the scale in each case? What would be the reading if

the lift mechanism failed and it hurtled down freely under gravity?

Q.4.State the Newton’s laws of motions.

Q.5. Two bodies A & B of masses 10 kg and 20 kg respectively kept on a smooth

horizontal surface are tied to the ends of the light string. A horizontal force F=600 N

is applied to: (i) A and (ii) B along the direction of string . What is the tension in the

string in each case .

Q.6 .A batsman deflects a ball by an angle of 450 without changing its initial speed

which is equal to 54 km/h. What is the impulse imparted to the ball ? Mass of the ball

is 0.5 kg.

Q.7.(a) Derive an expression for acceleration of a body down a rough inclined plane .

(b) Define absolute and gravitational unit of force .

WORKSHEET 2

1. A car is moving with uniform velocity on a rough horizontal road. Therefore,

according to Newton's first law of motion

(a) No force is being applied by its engine

(b) A force is surely being applied by its engine

(c) An acceleration is being produced in the car

(d) The kinetic energy of the car is increasing

2. A person is sitting in a travelling train and facing the engine. He tosses up a coin

and the coin falls behind him. It can be concluded that the train is

(a) Moving forward and gaining speed

(b) Moving forward and losing speed

(c) Moving forward with uniform speed

(d) Moving backward with uniform speed

3. A block can slide on a smooth inclined plane of inclination kept on the floor of

a lift. When the lift is descending with a retardation a, the acceleration of the block

relative to the incline is

(a) sin)( ag + (b) )( ag−

(c) sing (d) sin)( ag −

4. A 60 kg man stands on a spring scale in the lift. At some instant he finds, scale

reading has changed from 60 kg to 50kg for a while and then comes back to the

original mark. What should we conclude ?

(a) The lift was in constant motion upwards

(b) The lift was in constant motion downwards

(c) The lift while in constant motion upwards, is stopped suddenly

(d) The lift while in constant motion downwards, is suddenly stopped

5. When a body is acted by a constant force, then which of the following quantities

remains constant

(a) Velocity (b) Acceleration

(c) Momentum (d) None of these

6. A man of weight mg is moving up in a rocket with acceleration 4 g. The apparent

weight of the man in the rocket is

(a) Zero (b) 4 mg

(c) 5 mg (d) mg

7. A spring balance and a physical balance are kept in a lift. In these balances equal

masses are placed. If now the lift starts moving upwards with constant

acceleration, then

(a) The reading of spring balance will increase and the equilibrium position of

the physical balance will disturb

(b) The reading of spring balance will remain unchanged and physical balance

will remain in equilibrium

(c) The reading of spring balance will decrease and physical balance will remain

in equilibrium

(d) The reading of spring balance will increase and the physical balance will

remain in equilibrium

8. As shown in the figure, two equal masses each of 2 kg are suspended from a

spring balance. The reading of the spring balance will be

(a) Zero

(b) 2 kg

(c) 4 kg

(d) Between zero and 2 kg

SANT NIRANKARI PUBLIC SCHOOL

2kg 2kg

SUBJECT – CHEMISTRY

CLASS – XI WEEK 1 ASSIGNMENT -2

1. How is pressure in atm related to the pressure in pascals ?

2. Mention the SI unit of universal gas constant (R).

3. List the three main points of difference between a solid, a liquid and a gas.

4. State Charles’ law. How is this law used in the metorologicalobservations ?

5. Calculate the total pressure in a mixture of 8.0 g of oxygen and 4.0 g of hydrogen confined in

a vessel of 1 dm3 at 27º C. R = 0.083 bar dm3 K−1 mol−1.

SUBJECT – CHEMISTRY

CLASS – XI WEEK1 ASSIGNMENT -1

1. What type of intermolecular forces operate in:

(a) noble gases (b) Water

2. Name two measurable properties of the gases.

3. State Dalton’s law of partial pressures. How is the law helpful in calculating the pressure of the

gases which are collected over water?

4. Define Boyle’s law. How is it represented mathematically?

5. What will be the pressure of the gas mixture when 0.5 L of H2 at 0.8 bar and 2.0 L of oxygen at

0.7 bar are introduced in a 1 L vessel at 27º C?

SANT NIRANKARI PUBLIC SCHOOL

NIRANKARI COLONY(PHYSICAL EDUCATION)

SESSION 2020-21

AUGUST WEEK -1 (ASSIGNMENT-1)

1. Explain the role of leader. (1)

2. When were the adventure games started ?(1)

3. How many types of leader are there ?(1)

4. What is surfing?(1)

5. What is Hypothermia in leadership. (1)

6. Leader should be Energetic and........ (1)

7. Explain the meaning of leadership. (3)

8. How we can make a leader through physical education.? (3)

9. Explain the types of adventure sports. (3)

10. Explain the role of a leader, why a leader is mandatory?(5)

11. Explain the objectives of adventure sports in detail. (5)

AUGUST WEEK -1 (ASSIGNMENT-2

1. Define the meaning of leader.(1)

2. What do you mean by para gliding (1)

3. Explain about the mountaineering. (1)

4. Which type of trekking involves altitudes upto5000 m ?(1)

5. How many graders of river rafting are there?(1)

6. Define physical activity?(1)

7. Briefly explain the role of leader in a team. (3)

8. Explain the qualities of a leader. (3)

9. Enlist the various types of adventure sports. (3)

10. What are the guidelines of all adventure sports? Explain aExplain

safety measures used during different adventures sports? (5 )

11. Explain the role of a leader why a leader is mandatory? (5 )

Class XI Assignment- 1 (Week1)

Subject: Computer Science

Python Fundamentals

1. What are the two modes of Python. Name them.

2. Identify the keywords from the following:

(i) from (ii) AND (iii) continue (iv) import

(v) elif (vi) IN (vii) else (viii) true

3. Identify the type of constants from the following:

4. (i) "Hello" (ii) 24 (iii) “Good Morning” (iv)”90.90” (v)”##$$”

(vi) 40.89

5. What are Escape Sequences in Python. Give examples .

6. What is the output of the following code : print 9//2

7. Identify type of tokens: if, file123, while, class_X

Sant Nirankari Public School Nirankari Colony

Class XI Assignment- 2 (Week1)

Subject: Computer Science

Python Fundamentals

1. Which is the correct operator for power(xy)?

a) x^y b) X**y c) X^^y d) None of the mentioned

2. Which one of these is floor division?

a) / b) // c) % d) None of the mentioned

3. What is the order of precedence in python?

i) Parentheses

ii) Exponential

iii) Multiplication

iv) Division

v) Addition

vi) Subtraction

a) i,ii,iii,iv,v,vi b) ii,i,iii,iv,v,vi c) ii,i,iv,iii,v,vi

d) i,ii,iii,iv,vi,v

4. What is answer of this expression, 22 % 3 is?

a) 7 b) 1 c) 0 d) 5

5. Special meaning words of Pythons, fixed for specific functionality are called _____

a) Identifier b) Functions c) Keywords d) literals