Idea Transcript
DEHRADUN PUBLIC SCHOOL HOLIDAY HOMEWORK (2017-18) CLASS XII The summer holidays homework is also available on school website i.e. www.ddps.in ENGLISH (301) 1. Write a summary of two National and International events that have been featured in the newspapers/news channel on television You may follow the given format Paste the newspaper clipping Make notes in the ‘note-form’ Write a brief summary in your own words about the issue 2. Writing skill It enhances a particular language to have a better command in English Language, we must be perfect in writing skills. In order to score better, you need to practice the following as per the CBSE formats. Formal letters (Any 2) Article (Any 2) Invitations(Any 2) Replies to invitations (Any 2) Speech/debate PHYSICS (042) Project Topics 1. To design an electroscope, so as to study amount of charge. 2. To investigate relation between (i) ratio of input & output voltage (ii) no. of turns of primary & secondary of a transformer 3. To investigate dependence of angle of deviation & angle of incidence using hollow prism. 4. To study factor on which self inductance of a coil depends by observing the effect of this coil when put in series with a bulb. 5. To study Combination of logic gate (1) NAND (2) NOR. 6. To study logic gate (1) AND (2) OR (3) NOT. 7. To study polarization of light. 8. To study total internal reflection by an application. 9. To study the principle & working of half wave rectifier. 10. To study the principle & working of full wave rectifier. 11. To study particle nature of light. 12. To study diffraction of light. 13. To study electromagnetic induction by an application. 14. To study the working of AC generator. 15. To study the effect of temperature on magnetic properties of material CHEMISTRY(043) 1. Do assignment questions of Unit I, II and X. 2. To prepare an investigatory project on any one of the topics given below: i. To study the presence of oxalate ion content in guava fruit of different stages of ripening . Page 1 of 6
ii. iii.
To study the quantity of caesin present in different samples of milk. Preparation of soyabean milk and its comparison with the natural milk with respect to curd formation, effect of temperature and taste. iv. To compare the rates of fermentation of the following fruit or vegetable juices i) apple juice ii) orange juice iii) carrot juice v. To compare the rates of fermentation of the following of the given samples of wheat flour, gram flour, rice and potatoes. vi. To extract essential oils present on saunf (aniseed) , ajwain (carum) and illaichi (cardamom). vii. To detect the presence of adulternants in fat, oil,butter and sugar. viii. To detect the presence of adulternants in chilli powder, turmeric powder and pepper. ix. To prepare potash alum from scrap aluminium. x. To study the effect of metal coupling on rusting of iron. xi. To prepare rayon threads from filter papers using cupram monium process. xii. To dye wool and cotton clothes with malachite green. xiii. Determination of the dosage of bleaching powder required for sterilization or disinfection of different samples of water. xiv. To study of setting of mixtures of cement with lime, sand of different qualities , rice husk, fly-ash ,sand , lime with respect to time and strength. xv. To study the presence of insecticides/ pesticides (nitrogen- containing) in various fruits , vegetables and cold-drink. xvi. To analyse the given samples of commercial antacids by determining the amount of hydrochloric acid they can neutralize. BIOLOGY (O44) Q.1Do assignment Questions of Chapter 3, 4 and 5. Q.2Prepare investigatory project on one of the following topicsa) AIDS b) DNA fingerprinting c) Drugs and Alcohol d) Cancer e) Malaria/Dengue f) Air pollution (Effect on Algae, Protozoa, fish or insects)case study g) Contraceptive Methods h) Chromosomal Disorders i) Mendelian Disorders j) Pedigree analysis k) Allergy l) Tissue Culture/Somatic hybridization-recent advancements m) Transgenic animals and plants-ethical issues n) Reproductive health and hygiene MATHEMATICS (041) 4 4 4 3 1.Consider f: R-{3} → − 3 given by = 3 4.show that f is bijective.find the inverse of fand hence 1
(0) and x such that
1
= 2.
Page 2 of 6
2. If tan
1
3
+ tan
3
1
= 4 , then find the value of x. 8 0 3.If for any 2 × 2 square matrix A. = , then write the value of | |. 0 8 4. If function f and g are given by = 1,2 , 3,5 , 4,1 , 2,6 , = 2,6 , 5,4 , 1,3 , 6,1 , find the range of f and g and write down the function fog and gof. 4 1 1 5. Write the principal value of the following- (i) sin 1 (sin 5 ) (ii) sin 1 2 + cos 1 2 4
4
6. What is the domain of function sin 7. Solve for x cos 8. Prove that tan 9. If
= cot
1
√
10. Show that tan
1
1
4 1 2
2
1
2
1 1
+ tan
+ 2 cos − tan
sin
11. Prove that cos tan
1
13 4
1
1
=
√
1
2 2
1
+ tan
4 √7 3
sin cot
1
1
?
=
1
2
3 4
1
− 2 cos
1
, then prove that =
1
2
2
2
=
2
=
2
2
1 3 −2 12. Using elementary transformations, find the inverse of the matrix − 3 0 − 1 2 1 0 2 + 2 2 + 1 1 13. Using properties of determinants, prove that 2 + 1 − 1 3 + 2 1 = 3 3 1 + 4 2 = 3 14. Using properties of determinants, prove that 5 + 4 10 + 8 8 3 15. Using properties of determinants, prove that + + 2 = 2 + + 3 + + 2 + + 2 2 −3 5 16. If = 3 2 − 4 , find 1 . Solve the following system of equations: 1 1 −2 2 − 3 + 5 = 163 + 2 − 4 = − 4 + − 2 = − 3 −4 4 4 1 17. Determine the product − 7 1 3 1 5 −3 −1 2 = 4, − 2 − 2 = 9,2 + + 3 = 1.
−1 −2 1
1 − 2 and use it to solve the system of equations 3
−
ACCOUNTANCY (055 ) PROJECT ONE-Student will prepare the PROJECT FILE with introduction and detailed/complete solution of the Comprehensive problem and will submit after Summer break. Each step of the solution needs to be highlighted and conclusion drawn should be mentioned at the end. ECONOMICS( 030) Student will prepare the PROJECT FILE with introduction and detailed information of the selected topic and will submit after Summer break. Students are supposed to pick any one of the two suggested projects PROJECT ONE - What’s going around us? Student may work upon introduction, details of the topic, pros and cons of the economic event, major Page 3 of 6
+
criticism related to the topic(if any),student’s own view/perception/opinion and learning from the work. Suggested list-(i)Micro and small scale industries (ii)Disinvestment Policy (iii)Goods and service tax act (iv)Human development index (v)Food supply channel in India (vi)Inclusive growth strategy (vii)Contemporary employment situation in India (viii)Health expenditure (of any state) PROJECT TWO- Analyse any concept from the syllabus Student may work upon introduction, meaning and definition, application of the concept ,diagrammatical explanation, numerical explanation related to the concept, student’s own view/perception/opinion and learning from the work. Suggested list-(i)Price determination (ii)Opportunity cost (iii)Demand and its determinants (iv)Monopoly (v)Monopolistic competition (vi)Money multiplier (vii)Government budget and its components (viii)Exchange Rate system (ix)Balance of payments (x)Central bank and its function OR any other topic from the syllabus BUSINESS STUDIES(054) Student will prepare the PROJECT FILE with introduction, detailed information of the selected topic and conclusion and will submit after Summer break. PROJECT ONE- Choose any one topic - (i)Elements of Business Environment (ii) Principles of Management INFORMATICS PRACTICES (065) 1. Do assignment questions of Chapter 3, 4 and 5. 2. Pranati works as a programmer in a travel company. She has developed the following code to display travel detail according to user’s choice. Help her in rewriting the same code using SWITCH CASE: if(choice==1) jTextField1.setText(“New Delhi to Goa”); else if(choice==2) jTextField1.setText(“New Delhi to Paris”); else if(choice==3) jTextField1.setText(“New Delhi to Bangkok”); else jTextField1.setText(“Pl. choose valid option”); 3. Give the output of the following code : int m=100; while (m>0) { if (m0) { r=a%10; if (r%4==0) s1+= r; else s2+=r; a/=10; } System.out.println("s1 ="+ s1); System.out.println("S2 ="+ s2); } 6. What will be output of the following code:
byte b; double d= 417.35; b= (byte) d; System.out.println(b) 7. What command do you need to write in actionPerformed() event handler of a button, in order to make it exit button? 8. What will be the output of the following program code? int m = 100; int n = 300; while(++m < --n); System.out.println(m+” “+ n); 9. What does the following fragment display?
string s = “six:” + 3+ 3; System.out.println(s); 10.Consider the following class definition: Class Student { abstract double result( ) } This code will not compile since a keyword is missing in the first line. What is the keyword?
NOTE: SELECT A TOPIC FOR PROJECT AND PREPARE A BLUE PRINT FOR THE SAME. PHYSICAL EDUCATION (048) Q.1-Write benefits and paste pictures of any two Asanas as preventive measures fora) Obesity b) Diabetes c) Asthma d) Hypertension e) Back Pain. Q.2-Prepare a table of Micronutrients specifyinga) Name of Micronutrients, b) Sources c) Role of function in body d) Deficiency Symptom. Q.3-Prepare practical record files according to prescribed syllabus. Page 5 of 6
FASHION STUDIES (053) 1. Collect minimum 15 Trims write their names and uses. 2. Take a single colour T-shirt and paint it according to your imagination. 3. Complete your file cover beautifully and submit it when school reopen. SOCIOLOGY (039) 1. Prepare a project file on any one of the following topics: List of suggested assignments for Project worka) Explain role of communication media in our society (any one case study). b) Submit a piece of research on Public transport. c) Case study on Household appliances and Domestic Work. d) Case study on “Biography” of commodity. e) Case study on “Nationalism”. f) Submit a social research on the use of Public Space. g) Submit your observation on changing aspiration of different age groups. h) Social Research on Secularism in modern India. i) Submit a report on Child marriage practice in India. j) Submit a piece of research on changing viewpoints on Indian family system (nuclear and joint family) (Note: Project must include statement of the purpose, methodology/technique, conclusion) POLITICAL SCIENCE ( 028) Answer the following questions: Why did India not join either of the two camps during the cold War? What was the root cause of the beginning of the cold War? When and where was the first non-aligned summit held? Why is it said that history of petroleum is also the history of war and struggles? What do you mean by shock therapy? Discuss the drawbacks of the Soviet system. Trace the stages of collapse of communism in USSR. Examine India’s changing relationship with post-communist Russia. Which two princely states refused to join either Pakistan or India at the time of Independence?
NOTE: PREPARE JULY PERIODIC TEST FOR ALL SUBJECTS
Page 6 of 6