SANT NIRANKARI PUBLIC SCHOOL

WEEK 2 (Assignment)

Subject : Physics

Assignment 1

1 Charges 5Χ10−7𝐶, −2.5Χ10−7 𝐶 and 10−7 𝐶 are held fixed at the three corners A,B and C of an equilateral triangle of side 5 cm find the electric force on the charge at C due to the rest two2 Consider the charges +q, +q & -q are placed at the vertices of an equilateral triangle of each side l. what is the resultant force on each charge?

3 (a) An electric field line is a continuous curve i.e. a field line cannot have

sudden breaks why not? (b) Explain why two electric field lines never cross

each other at any point

4 Why do the electric field lines not from closed loop?

5. Why the electric field inside a conductor is Zero?

6. During lightning, it is safest to sit inside a care rather than near a tree. Why?

7. A point charge +q is kept in the vicinity of uncharged conduction plate.

Sketch electric field lines origination from the point on to the surface of the

plate.

8 A proton is placed in a uniform electric field directed along the positive X-

axis. In which direction will it tend to move?

Subject : Physics

Assignment 2

1. An electron is placed in a uniform electric field directed along the positive Y-

axis. In which direction will it tend to move?

2. Two point charges +3 μC and -3 μC are placed at points A and B respectively,

20 cm apart in vacuum. Find the electric field at the midpoint of the line AB

joining the two charges.

4 Two point electric charges of values q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in

such a way that the net force acting on it is zero determine the position of charge Q in terms of d.

5 Two particles A and B having charges 8Χ10−6 C and −2Χ10−6 C respectively are held fixed with a separation of 20 cm. where a third charged particle should be placed so that it does not experience a net electric force?

6 Two charges +Q and –Q are kept at (−𝑥10) 𝑎𝑛𝑑 (𝑥2, 0) respectively in the X-

Y plane. Find the magnitude and direction of the net electric field at the origin

(0,0).

7. ABC is an equilateral triangle of each side 5cm. Two charges of 35010 C

3

are placed at A and B respectively. Calculate the magnitude the direction of

resultant electric field intensity at point C.

8. Two point charges 4 Q and Q are separated by 1 m in air. At what point on

the line joining the charges is the electric field intensity zero?

Subject : Mathematics

Assignment 1

Subject : Mathematics

Assignment 2

Subject : Biology

Assignment 1

Subject : Biology

Assignment 2

CHAPTER 1: REPRODUCTION IN ORGANISMS I) 3 MARKS QUESTIONS 1. Define external fertilization. Mention its disadvantages. What are hermaphrodites? 2. Describe gametogenesis with suitable examples. What do you mean by monoecious and dioecious organisms? 3. Diagrammatically depict asexual reproduction /vegetative propagation in –a) Amoeba b) Chlamydomonas c)Bryophyllum II) 5 MARKS QUESTIONS 1. a) Describe the terms: Ovipary, Vivipary and Ovo-vivipary b) State the post fertilization changes in flower CHAPTER 2: SEXUAL REPRODUCTION IN FLOWERING PLANTS II) 3 MARKS QUESTIONS 1. (a) Discuss the development of endosperm in coconut. (b) What are tassels of corn cob? (c) Mention one similarity between autogamy and geitonogamy. 2. What is apomixis? Explain any two ways by which apomictic seeds develop. 3. What is agamopermy? How is it different from parthenocarpy and parthenogenesis? 4. Draw a neat, labelled diagram of an anatropous ovule. III) 5 MARKS QUESTIONS 5. (a) Explain the development of embryo in dicots. (b) Why do most zygotes in angiosperms develop only after a certain amount of endosperm is formed? CHAPTER 3: HUMAN REPRODUCTION I) 3 MARKS QUESTIONS 1. Describe how the changing levels of FSH, LH and progesterone during menstrual cycle induce changes in the ovary and the uterus in human females? 2. Write the specific location and function of the following cells in human males a. Leydig cells b. Sertoli cells c. Primary spermatocytes 3. Schematically represent the process of gametogenesis in females. What is the significance of epididymis in male fertility?

II) 5 MARKS QUESTIONS 1. Explain the following: a. Acrosomal reaction b. Accessory glands in females c. Sperm lysins d. Decapacitation factors e. Extra-embryonic membranes CHAPTER 4: REPRODUCTIVE HEALTH I) 3 MARKS QUESTIONS 1. A) How do oral pills help in birth control? Name the common pills used (11/2) B) Which of these has been produced by CDRI and how is it more effective? (11/2) 2. Give a brief account of various intra-uterine devices. How do they function? What are their advantages? 3. a. What are the various reasons that call for MTPs? b. What are the risk factors associated with MTP? II) 5 MARK QUESTIONS 1.Describe the various techniques employed under ART.

Subject : English

Assignment 1

Poem 2- An Elementary Classroom in a Slum 1. What do you think is the colour of ‘sour cream’? Why do you think the poet has used this expression to describe the classroom walls? 2. What has possibly weighed-down the tall girl’s head? 3. What is the stunted boy reciting? 4. Who is sitting at the back of the dim class ? 5. Who is the unlucky heir’and What has he inherited ? 6. The poet says’and yet for these children, these windows, not this map ,their world.Which world do these children belong to ? Which world is inaccessible to them ? 7. What does the poet Stephen Spender wish for the children of slum? Chapter – 1 The Third level (Vistas) 1. Do you think that the third level was a medium of escape for Charley? Why? 2. What do you infer from Sam’s letter to Charley ? 3. What happened when Charley went to the Grand Central Station with the old style currency bills?

4. Describe briefly the scene at the third level of Grand Central as seen (or seemed to be seen) by Charley. 5. What do you know a first-day cover? Poem 2- An Elementary Classroom in a Slum

Subject : English

Assignment 2

1. What do you think is the colour of ‘sour cream’? Why do you think the poet has used this expression to describe the classroom walls? 2. What has possibly weighed-down the tall girl’s head? 3. What is the stunted boy reciting? 4. Who is sitting at the back of the dim class ? 5. Who is the unlucky heir’and What has he inherited ? 6. The poet says’and yet for these children, these windows, not this map ,their world.Which world do these children belong to ? Which world is inaccessible to them ? 7. What does the poet Stephen Spender wish for the children of slum? Chapter – 1 The Third level (Vistas) 1. Do you think that the third level was a medium of escape for Charley? Why? 2. What do you infer from Sam’s letter to Charley ? 3. What happened when Charley went to the Grand Central Station with the old style currency bills? 4. Describe briefly the scene at the third level of Grand Central as seen (or seemed to be seen) by Charley. 5. What do you know a first-day cover?

Subject : Chemistry

Assignment 1

Question (1):- what is meant by reverse osmosis? Question (2):- Define osmotic pressure. Question (3):- What are isotonic solutions? Question (4):- Calculate the molarity of 2.5 g of acetic acid in 75 g of benzene. Question (5):- 10.3 g NaBr dissolved in 500 ml water. Calculate the Molarity of solution.

Subject : Chemisty

Assignment 2

Question (1):- How many gram of water required for the formation of 500 ml solution of 0.1 M sodium carbonate? Question (2):- 6.3 g crystalline oxalic acid is dissolved in 250 g of water, Calculate the molality of the solution. Question (3):- Calculate the molality of pure water. (Specific density = 1) Question (4):- 4 g NaOH is dissolved in 100 g of water. Calculate the molality of solution.

Subject : Computer Science

Assignment 1

Topic :More on SQL

1. What is null value in Mysql?

2. Differentiate between WHERE and HAVING clause.

3. How are NULL values treated by aggregate functions?

4. Why is it not allowed to give string and Date type arguments for SUM() and

AVG() functions?

5. What is the purpose of GROUP By clause?

6. Consider the following structure of TEACHER and STUDENT tables:

Teacher

TeacherID TName City Subject Qualification Designation Pay

STUDENT:

StdID Name FName Stream TeacherID

Write SQL command to get the following

a) Display the maximum pay of the teacher who is teaching English.

b) Count the number of students in the commerce stream.

c) Show the names of students enrolled in the science stream.

d) Count the number of teachers in each designation

7. Consider the given table FACULTY and answer the questions that follow:

F_ID FName L Name Hire date Salary

102 Amit Mishra 12-10-1998 10000

103 Nitin Vyas 24-12-1994 8000

104 Rakshit Soni 18-05-2004 14000

105 Rashmii Malhotra 11-09-2004 11000

106 Sulekha Srivastava 05-06-2006 10000

a) What is child pornography?

b) Explain the term Web beacons?

c) How can I prevent identity thefts?

d) What are the different ways in which authentication of a person can be

performed?

e) If someone hacks your website , who would you complain to .

Subject : Computer Science

Assignment 2

Topic : Society , Law and Ethics

1. Any information about you or created by you that exists in digital form is

referred to as ____________

2. What do you understand by ‘Privacy of data’?

3. What is Cyber Crime?

4. What is the importance of cyber law?

5. Differentiate between Hacker and Cracker.

6. What is Plagiarism?

7. What is the relationship between ethics and law?

8. What do you understand by the concept of cyber forensics?

9. What is IT Act 2000 in India ?

10. How do people unknowingly do cyber crime?

11. What do you mean by illegal downloads? What are its repercussions?

12. What precautions should be taken to avoid phishing?

13. Define e- waste. What are the various methods for effective e-waste

management?

14. What are the elements of a viral video?

15. What are the drawbacks of social media networks?

16. What is child pornography?

17. Explain the term Web beacons?

18. How can I prevent identity thefts?

19. What are the different ways in which authentication of a person can be

performed?

20. If someone hacks your website , who would you complain to .

Subject : Economics

Assignment 1 (one marker) Q.1. Monetary policy is the policy of : (a) government (b) commercial bank (c) Central bank (d) NABARD Q.2. The RBI can influence money supply by changing the rate at which it gives loans to the commercial banks For long –term periods. This rate is called the …………………. In India.

(a) Bank rate (b) Repo rate (c) lending rate (d) high powered money Q.3. ……………………. Refers to buying and selling of bonds issued by the govt. in the open market by the central Bank on h\behalf of the govt. Q.4. When RBI buys a government bond in the open market, it ……………. The money supply in the economy. (increases/decreases)

Q.5. If the RBI increases the bank rate, money supply in the economy …………………. (increase /decrease) Q.6. The ratio of net total demand and time deposits that a commercial bank has to keep with RBI is called: (a) SLR (b) Deposit Ratio (c) CRR (d) LRR Q.7. Which of the following changes by the Central Bank can increase the money supply? (a) Increase in Repo rate (b) Sale of govt. securities in the open market (c) increase in CRR (d) purchase of govt. securities in the open market Q.8. To curb inflation, the RBI should ………………….. (a) reduce the bank rate (b) reduce the Repo rate (c) sell the govt. securities (d) reduce the reverse repo rate Q.9. To promote liquidity in the economy, the central bank must reduce Reserve repo rate. ( true/false) Q.10. Loan offered by a commercial bank would increase money supply in the economy. (true/false) Q.11. CRR is defined as……………………. Q.12. Define Repo rate. ( 3 and 4 marker questions) Q.1. Explain how the central bank plays the role of ‘ controller of credit in an economy. Q.2. How will ‘ Reverse Repo rate ‘ and ‘open market operation’ control exces money supply in an economy? Q.3. How does the following effect the money supply in the economy: (a) bank rate (b) margin requirement (c) statutory liquid ration (d) CRR Q.4. ‘Due to spread of Covid-19 virus, RBI announces cut in Repo rate, Reverse repo rate and CRR’. How does this helps the economy?