Subject : Physics

Assignment 1

1. What is the geometrical shape of equipotential surfaces due to a single isolated charge?

2. Draw equipotential surfaces due to a single point charge. 3. Two charges 2 µC and -2 µC are placed at points A and B, 5 cm

apart. Depict an equipotential surface of the system. 4. What are the dimensions of capacitance? 5. A slab of material of dielectric constant K has the same area as that

of the plates of a parallel plate capacitor, but has the thickness d/2, where d is the separation between the plates. Find out the expression for its capacitance when the slab is inserted between the plates of the capacitor.

Subject : Physics

Assignment 2

1. Two capacitors of 1 µF capacitance are connected to a battery of 6 V. Initially switch S is closed. After sometime S is left open and dielectric slab of dielectric constant K = 3 are inserted to fill completely the space between the plates of the two capacitors. How will the (i) charge and (ii) potential difference between the plates of the capacitors be affected after the slabs are inserted?

2. Electric charge is distributed uniformly on the surface of a spherical rubber balloon. Show how the value of electric intensity and potential vary

i. on the surface, ii. inside and iii. outside?

3. A 5μF5μF capacitor is charged by a 100 V supply. The supply is then

disconnected and the charged capacitor is connected to another

uncharged 3μF3μF capacitor. How much electrostatic energy of the first

capacitor is lost in the process of attaining the steady situation?

4. Derive the expression for the capacitance of a parallel plate capacitor having plate area A and plate separation d.

i. Two charged spherical conductors of radii R1 and R2 when connected by a conducting plate respectively. Find the ratio of their surface charge densities in terms of their radii.

5. Explain using suitable diagrams, the difference in the behaviour of a

(A) conductor and (B) dielectric in the presence of external electric field. Define the terms polarisation of a dielectric and write its relation with susceptibility.

6. A thin metallic spherical shell of radius R carries a charge Q on its surface. A point charge Q/2 is placed at its centre C and another charge + 2Q is placed outside the shell at a distance x from the centre as shown in the figure. Find

a. the force on the charge at the centre of shell and at the point A,

b. the electric flux through the shell.

SUBJECT : ENGLISH ASSIGNMENT - 1

FLAMINGO CHAPTER 2- THE LOST SPRING ( PART -2)

Answer the following questions in about 30-40 words :-

1. What makes the city of Firozabad famous ?

2. Mention the hazards of working in the glass bangles industry?

3. Who is Mukesh ? What is his dream ?

4. How is Mukesh‟s attitude to his situation different from that of his family ?

5. Describe the life and poverty of the bangle makers.

6. What force conspire to keep the workers in the bangle industry of Firozbad in poverty ?

7. Why should child labour be eliminated and how?

SUBJECT : ENGLISH ASSIGNMENT - 2

Q1. Read the following passage carefully :-

1. An Indian visitor to Cairo stopped to hear a muezzin‟s melodious call to

prayer. When the azzan had ended, the muezzin approached the visitor

and, in rudimentary English, asked where he was from. “India”, replied the

visitor. “Muslim?” asked the muezzin. “No”, said the visitor. “Little bit

Muslim?” asked the muezzin. “Yes, little bit Muslim,” agreed the visitor.

2. That exchange represents a cross-cultural tribute to what is often referred

to as India‟s long tradition of eclecticism, or what might be called Indutva.

It is a tradition based on anekantavada, the ability to see the other person‟s

point of view. Or as a western philosopher has put it, the realization that

the opposite of a great truth need not be a lie but another, and equally

valid great truth.

3. This ambiguity of faith, this welcoming of multiplicity, is the bedrock of

Indic civilization, of Indutva. It is not an acceptance but a celebration of the

fact that, at times, we can all be a little bit of this and a little bit of that. The

Indian knack of being able to absorb and internalize whatever comes our

way is often compared to a sponge which soaks up any moisture that it

comes into contact with. It‟s an inaccurate metaphor, for a sponge is a

passive object, its capacity to absorb is not elective, not something that it

chooses. Indian eclecticism, or Indutva, on the contrary, is highly creative;

there is nothing passive or constrained about it. It is an active engagement

with diverse cultural norms and beliefs, which it seeks to link. It‟s like a

universal language of faith, a spiritual Esperanto, if you like, Indutva‟s

vocabulary includes idioms not just from the major belief systems like

Islam, Sikhism and Budhism, but of minor religions as well which India has

made its own, and which include Westminster style democracy and cricket.

4. The great majority of Indians are Hindu. But there are almost as many kinds

of Hinduism as there are Hindus. There are atheist Hindus, and Hindus who

eat beef. There are Hindus who partly believe in Islam, and Muslims who

are part Christians, like the Brahmos, and Christians who remain Hindus,

like converts who retain their caste and other social traditions even after

embracing Christianity.

5. Long before we had multiplex cinema halls in India, we have multiple places

of worship, the Shantadurga Shrine in Goa which attracts devotees who are

both Hindus and Christians—or, indeed, who are neither. Salim Chisti‟s

memorial in FatehpuriSikri—where pilgrims of all faiths flock—is another

example of the multiplicity of Indutva. Shrines apart, Holi and Diwali, Eid

and Christmas, are celebrated by people of all creeds. Indutva is a bouquet

of many faiths, a garland of festivals.

6. You are invited to identitfy and explore the myriad strands that, over the

millennia, have been inextricably woven together to create the seamless

fabric of Indutva, to which new threads are added every day.

(a) On the basis of your understanding of the above passage, make notes

on it using headings and subheadings. Use recognizable abbreviations

and a format you consider suitable. Also supply an appropriate title to it.

(b) Write a summary of the passage in about 80 words.

Q2. Write an article in about 150-200 words on „Effects of quarantine on our Environment‟.

SUBJECT : BIOLOGY ASSIGNMENT 7

CLASS XII (CHAPTER-4)

Q1.Give the term for prenatal diagnostic technique aimed to know the sex of developing foetus and to detect congenital disorders.

Q.2. Our government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.

Q.3. After a successful in vitro fertilisation, the fertilised egg begins to divide. Where is this egg transferred before it reaches the 8-celled stage and what is this technique called?

Q.4. Give technical name of female used to bring up in vitro fertilized egg to maturity. Q. 5. Mention one positive and one negative application of amniocentesis.

Q.6. What is the WHO’s interpretation of reproductive health?

Q.7. What is lactational amenorrhoea?

Section ‘B’

Q. 8. How do copper and hormone releasing IUDs act as contraceptives? Explain

Q.9. Suggest and explain any three Assisted Reproductive Technologies (ART) to an infertile couple.

Q.10. Mention the problems that are taken care of by Reproduction and Child Health Care programme.

Q. 11. Describe the Lactational Amenorrhea method of birth control.

SUBJECT BIOLOGY ASSIGNMENT 8

CLASS XII (CHAPTER-4)

Q.1 After a brief medical examination a healthy couple came to know that both of them are unable to produce functional gametes and should look for an ART, (Assisted Reproductive Technique). Name the ART, and the procedure involved that you can suggest to them to help them bar a child.

Q.2. Lactational Amenorrhea is a method of contraception Justify. What is the maximum effectiveness of this method in terms of period/duration?

Q.3. Briefly explain two natural barriers for birth control.

Q.4. What does GIFT represent? Q5. Why is CuT (Copper T) considered a good contraceptive device to space children?

Q.6 How does Cu- T act as a contraceptive?

Q.7 A mother of one year old daughter wanted to space her second child. Her doctor suggested CuT. Explain its contraceptive actions.

Q.8. “Removal of Gonads cannot be a contraceptive option”. Why?

Q.9. If implementation of better techniques and new strategies are required to Provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify the ban.

Q.10. A large number married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being Childless (a) why in your opinion the female partner is often blamed for such situations in India? Mention any to values that you as biology student can promote to check this social evil. (b) State any two reasons responsible for the cause of infertility. (c) Suggest a technique that can help the couple to have a child where the problem is with the male partner.

Q.11. What is amniocentesis and why there is a statutory ban on it?

Q.12. Your school has been selected by the Department of Education to organize and host an interschool seminar on “Reproductive Health - Problems and Practices". However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is "too embarrassing." Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.

Q.13. Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects. As this is important and essential for building a reproductively healthy society. (a) "Providing sex education in schools is one of the ways to meet this goal." Give four points in support of your opinion regarding this statement. (b) List any two 'indicators' that indicate a reproductively healthy society.

Q.14. Mention the various precautions one has to take in order to protect himself/herself form STDs.

Q.15. Explain any one natural method of birth control.

Q.16. Suggest some methods to assist infertile couples to have children?

SUBJECT: Computer Science

ASSIGNMENT-1 (WEEK-4)

Topic: Computer Networks

1. What is ARPANET?

2. Explain different switching techniques.

3. Name and explain different network topologies.

4. What are the different types of transmission media?

5. How TCP/IP works?

6. Write down advantages and disadvantages of Twisted pair cables.

7. What is SMTP?

8. Explain the use of network device : Gateway

9. Make a comparative chart of 1G, 2G, 3G and 4G

10. What is POP3?

SUBJECT: COMPUTER SCIENCE

ASSIGNMENT-2 (WEEK-4)

Topic: Computer Networks

1. What are the protocols used in Chat and video Conferencing?

2. What are Mobile Processors?

3. Explain different wireless technologies.

4. What is GPRS?

5. What is Web Hosting ?

6. How firewall plays important role in network security?

7. What are cookies? How are they useful?

8. How payment transactions take place in an E commerce environment?

9. What is the difference between http and https?

10. What is malware?

Subject Mathematics

Assignment 1

Subject : Chemistry

Assignment 1

1. Give various expressions for van’t Hoff factor?

2. How are the various colligative properties modified after consideration of

van’t Hoff factor?

3. The boiling point elevation of 0.6g acetic acid in 100g benzene is 0.1265k.

What conclusion can you

draw about the state of solute in solution? Molar elevation constant for

benzene is 2.53 deg per molar?

4. At 300K, 36g of glucose present in a litre of its solution has an osmotic

pressure of 4.98 bar. If the

osmotic pressure of the solution is 1.52 bar at the same temperature, what

would be its concentration?

5. Calculate the amount of benzoic acid required for preparing 250ml of

0.15M solution in methanol.

Subject : Chemistry

Assignment 2

1. Define the term solution. How many types of solutions are formed? Write

briefly about each type with an example.

2. How is osmotic pressure of a solution related to its concentration?

3. What happens when red blood cells are placed in 0.1% NaCl solution?

4. When is the value of i less then unity?

5. The molecular mass of a solute is 120g/mol and van’t Hoff factor is 4. What

is its abnormal molecular mass?

6. The vapour pressure of solvent gets lowered, when a non-volatile solute is

added to it.Why?

7. Why is the boiling point elevated when a non–volatile solute is dissolved in

a liquid?

8. Calculate the osmotic pressure in pascals exerted by a solution prepared by

dissolving 1.0 g of polymer of molar mass 185,000 in 450ml of water at 37

degree Celsius.