KENDRIYA VIDYALAYA

WINTER BREAK HOLIDAYS HOME WORK (2015-16)

CLASS- XI

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1) (1) - | , | 200 |(2) | |

2) (1) |(2) , - |

Sub: English

1. Read the following passage carefully and answer the following questions by selecting the most appropriate options from the ones given below:

Believe it or not, a fragile and tiny wisp of paper could fetch millions of dollars! Considering their size and weight, postage stamps are perhaps the costliest item in the world. A well informed buyer or seller, who knows the intrinsic value of the postage stamp, can make this an alternative investment. As an investment it may be slow off-the-block as it is not guided by concept of stock and exchange, but it does have a global market. In USA, China and Europe, there are auction houses specialising in auctioning of stamps. Stanley Gibbson Ltd and Solhbys are some of the well known auction houses. The stamp dealers and collectors purchase and resell stamps here. Trading of stamps, like any other commodity, is a knowledge game based on the rules of demand and supply. The stamps, which are rare, few in number or with error in printing or old stamps with limited editions, are valuable from auctioneers and collectors point of view. The price depends on the condition of the stamps. They have to be preserved in transparent pouches and handled with great care. In India there is no organized sector for stamp dealers and collectors, but there are few auction houses. Stamp auctions are of two typesroom auction, the traditional style where connoisseurs collect to bid for items and post auctions in which auctioneer sends catalogue to collectors and they bid via post, e-mail or fax. Author of books on Philately, Vishnu Saxena said, Some of the most prestigious and popular stamps that were auctioned at Rs. One lakh each are the American cover known as Lady Mcgill printed in 1852, British Guiana 1885, Swedish stamp of 3 shillings of 1885, bicolour stamp and queens head in red with blue border printed upside down.

1. What amongst the following is not true about stamp collection? (a) It could fetch millions of dollars. (b) It does have a global market. (c) There is no auction house in India. (d) Solhbys and Stanley Gibbson Ltd are well known houses. 2. Stamp market is (a) guided by concepts of stock and exchange (b) a knowledge game based on concept of demand and supply (c) both (a) and (b) (d) none of the above 3. The word that does not have the same meaning as intrinsic (a) inherent (b) essential (c) carrying an underhand plot (d) belonging naturally 4. One of the following stamps was not auctioned at Rs. 1 lakh which one was that? (a) Lady Mcgill printed in 1852 (b) British Guiana, 1885 (c) Sind Dak, 1852 (d) Swedish stamp of 3 shillings of 1885 5. Two types of stamp auctions are (a) Room auction, the traditional type (b) Post auction (c) Open auction (d) both (a) and (b) Ans. 1. ___________ 2. ___________ 3. __________ 4. ___________ 5. ___________

2.Read the given passage carefully. On the basis of your reading of the above passage, answer the following questions by choosing the correct option from those given below:

Understanding Pain Pleasure and pain are the inseparable facets of human existence. While the experience of our wellbeing is rather vague and intangible, experience of pain is real, and affects our body, mind and spirit, altering our lives in more ways than one. Pain is an unpleasant sensory and emotional experience caused by tissue damage that results from physical trauma, burns, illness, injury or surgery. Despite the agony caused by pain, it is essential for our survival. If you dont feel pain, you could cause great harm to your body by inadvertently touching a hot iron or jamming your finger in the drawer and not even know it. Or you could rupture the appendix and be unaware of what was going on inside your body. Pain rings an alarm bell, alerting you to pay immediate attention and take quick action. Have you ever wondered why a severely wounded soldier continues to battle on so defiantly or an athlete injured during a race goes on to win it? It happens so because the brain does not react immediately to the pain signals, the sufferer just ignores them because there are more important tasks to attend. The pain registers only after the task or event is over. The perception of pain has been studied extensively by psychologists who suggest that there is a gating system in the central nervous system that opens and closes to let pain pass through to the brain or block it. Psychological factors such as attention to pain, emotional state of a person, anticipation of pain and the way that a person interprets a situation can both open and close the gates. This is why when you are depressed or anxious your pain seems worse and intolerablebecause your feelings can open the pain gate. On the other hand, when your attention is diverted or focussed on pleasant tasks, your pain is almost imperceptible. Thus the physical cause of the pain may be the same, the pain circuits identical, yet the perception of pain is dramatically different.

Pain is unpleasant, yet _____________ (a) we need to experience it (b) we cant escape it (c) it gives us pleasure (d) it is not real 2. Pain rings an alarm bell means that pain _____________ (a) warns that something is wrong (b) makes other people attend to us (c) makes us scream (d) warns us beforehand 3. Gating system in the central nervous system _____________ (a) prevents pain (b) changes our response to pain (c) destroys the nervous system (d) does not allow us to escape pain 4. Unhappiness or worry affects our system by _____________ (a) blocking the pain gate (b) diverting our mind away from pain (c) causing depression (d) making pain seem worse 5. The writer feels that pain is a _____________ (a) pleasurable experience (b) figment of our imagination (c) necessary evil (d) source of great harm to the body Ans. 1. ___________ 2. ___________ 3. __________ 4. ___________ 5. ___________

Or

Answer any two unseen passages . Write the passages and answer the questions. ( Word limit : 300-400 words)

1. Make notes of a passage in an appropriate format. Write the passage and make notes on it in proper format along with abbreviations .Supply necessary title . (note-making)

Writing

1. Meenakshi a student of class XI feels highly disturbed when she reads about the hike in the price of essential commodities like gas. pulse, vegetables etc. Write an article on Price- hike of essentials Commodities for publication in a local daily, suggesting certain steps to curb this menace.

1. You are Shishir/Swati. Write a speech to be delivered at the morning assembly in your school about the increase in violence and social unrest in your area. (about 200 words)

1. Read any National news paper and write two factual reports ( Based on news paper reports).

GRAMMAR

1. Look at the words and phrases below. Rearrange them to form meaningful sentences.

1. (a) values / and / character / made up / principles / is / of

1. (b) depth / your / direction / values / and meaning/ give life

1. (c) these / right / your / constitute / inner sense / of / and wrong /

1. feelings

1. (d) hard / life / have / make /choices / to / we / in / our

The following passages have not been edited. There is one error in each sentence. Underline the error and write the correct answer in the space provided

A good business letter is one that get results. _______________

The best way to get results was to develop a letter ________________

that, on its appearance, conveys information ________________

efficiently. To perform that function, ________________

business letter should be concise, clear and

courteous. Little introduction was necessary. ________________

Get to a point and leave it. It is safest _______________

to assume that your letter is being read

by a very busy person on all kinds _______________

of papers for deal with. Use precise ________________

words and sentences.

LONG READING NOVEL

1. Read The Canterville Ghost with special attention and write a book review on it.

(Cover the Plot Outline, Theme, Characters, Authors style , Important incidents)

MATHS

FOR CLASS XI :CONIC SECTIONS COMPLETE

PHYSICS

1.Define the term torque or movement of force give its units and dimensions ?

2.Explain the movements of rotational equilibrium.

3.Explain how the angular momentum can be expressed in the vector product of 2 vectors .how is the direction determined.discuss the cases of minimum and max angular momentum ?

4.Define the moment of inercia of a body give its units and dimensions .what is the physical significance of moment of inercia .

5.Define radius of gyration about body of some axis rotation . derive an expression on it .o n what factors does it depend?

6.State and prove perpendicular axis theorem?

7.State and prove perpendicular axis theorem?

8.Explain the relation between angular momentum and moment of inercia for a rigid body?

9.State and prove law of conservation of angular momentum

10.Explain the following

i.The angular velocity of revelution of earth around the sun increases wh