SICA SENIOR SECONDARY SCHOOL, SCH. NO. 78 SUBJECT - PHYSICS SUMMER VACATION ASSIGNMENT CLASS-XII ( )

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1 SUBJECT - PHYSICS 1. Determine the total charge on 75.0 kg of electrons.[ x C]. A charge Q is to be divided on two objects. What should be the values of the charges on the two objects so that the force between the objects can be maximum?[q/] 3. Calculate the distance between two protons such that the electrical repulsive force between them is equal to the weight of either. [1.18 CM] 4. The sum of two point charges is 7µC. They repel each other with a force of 1 N when kept 30 cm apart in free space. Calculate the value of each charge. [5µC, µc] 5. An infinite number of charges each equal to 4µC are placed along x-axis at x=1m, x=m, x=4m, x=8m and so on. Find the total force on a charge of 1C placed at the origin.4.8 x 10 4 N] 6. Consider three charges of equal magnitudes placed at the vertices of an equilateral triangle of side l. what is the force on a charge Q (with the same sign as q) placed at the centroid of the triangle? [zero] 7. When can we ignore the quantization of electric charge? Explain. 8. A point charge +10 μ C is at a distance of 5 cm directly above the centre of a square of side 10 cm. What is the magnitude of the electric flux through the square? 9. Calculate the distance between two protons such that the electrical repulsive force between them is equal to the weight of either. 10. Two similarly equally charged identical metal spheres A and B repel each other with a force of x10-5 N. A third identical uncharged sphere C is touched to A, then placed at the mid- point between A and B. Electrostatic force on C. 11. What is an electric dipole? Define dipole moment and give its SI unit. 1. Derive an expression for the electric field at a point on the equatorial line of an electric dipole. 13. State and prove gauss theorem. 14. Apply Gauss theorem to show that for spherical shell, the electric field inside the shell vanishes, whereas outside it, the field is as if all the charge had been concentrated at the centre. 15. A spherical conducting shell of inner radius r 1 and r has a charge Q. A charge q is placed at the centre of the shell. (i)what is the surface charge density on the inner and outer surface of the shell? (ii) Write the expression for the electric field at a point x> r from the centre of the shell. 16. Consider three charges of equal magnitudes placed at the vertices of an equilateral triangle of side l. what is the force on a charge Q (with the same sign as q) placed at the centroid of the triangle?

2 17. Keeping the voltage of the charging source constant, what would be the percentage change in the energy stored in a parallel plate capacitor if the separation between its two plates were to be decreased by 10%. 18. Find the ratio of the potential differences that must be applied across the parallel and the series combination of two capacitors C1 & C with their capacitances in the ratio 1:3 so that the energy stored in the two cases, become the same. 19. Three concentric metallic shell A, B and C of radii, a, b and c (a<b<c) have surface charge densities + - and + respectively. (i) draw suitable diagram, (ii) find potential of three shells A, B and C. (iii) If the shells A and C are at the same potential, obtain the relation between radii a, b and c. 0. Solve NCERT text book questions (solved, unsolved and additional exercise) of chapters Electrostatics-I & Electrostatics-II. 1. Write 8 activities in activity copy, 4 from section A and 4 from section-b.. Prepare a working model and project report on the basis of XII-PHYSICS syllabus, for fulfillment of board practical examination. ****************************

3 Q.1. Q.. SUBJECT - BIOLOGY What will you do to convert bisexual flower into a female flower, so that it is cross pollinated artificially by the pollen of some other flower. Differentiate between... a) Parthenocarpy and parthenogenesis. b) Zoospores and zygote. Q.3. Draw the sketches of zoospore and conidium. Mention two dissimilarities and at least one feature common to both. Q.4. Describe the stages of embryo development in a dicot plant. Q.5. a) Explain the process of double fertilization. b) Draw a labelled diagram of anatropus ovule. Q.6. Incompatibility is a natural barrier in the fusion of gametes. Justify the statement. Q.7. a) Write the characteristics features of anther pollen and stigma of wind pollinated flowers. b) How do flowers reward their insect pollinators? Explain. Q.8. Draw a labelled diagram of T.S. of mature pollen grain in angiosperms and explain the functions of its different parts. Q.9. Are Parthenocarpy and Apomixis different phenomena? Discuss their benefits. Q.10. a) List three strategies that a bisexual chagamous flower can evolve to prevent self pollination. b) Does self incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants. Q.11. "Nothing goes waste in the living system "Prove this statement with the help of different stages of Graffian follicle in the ovary. Q.1. A women has conceived and implantation has occurred within her uterus.discuss the sequence of changes upto the parturition which will take place within her body under the influence of various hormones in our body. Q.13. When and where are the primary acolytes formed in a human female? Trace the development of these acolytes till ovulation.how do gonadotropin help this developmental process? Q.14. Give an electron microscopic view of human sperm along with the diagram and description. Q.15. What is spermatogenesis? Where does it occur? Describe the stages of this process along with a flow chart. Q.16. Describe with the help of a diagram the internal structure of an ovary. Q.17. What are the major functions of male accessory ducts and glands also give the composition of semen. Q.18. Why are angiosperm anthers called dithecous? Describe the structure of its microsporangium. Q.19. Explain the role of tapetum in the formation of pollen grain wall. Q.0. Differentiate between... a) Coleoptile and Coleorrhiza b) Perisperm and Pericarp c) Leydigcell and Sertoli cells ***********************

4 SUBJECT MULTIMEDIA & WEB TECHNOLOGY Q.1 What is JavaScript? Q. What is Reserve word? Q.3 What is the difference between / and % operator? Q.4 State the difference between = and ==. Q.5 Explain about conditional operator with its syntax. Q.6 Evaluate the following expressions, if the values of the variables are a=, b=3 and c=9. (a) A=(b++)*(--c) (b) (b) a = (++b)%c Q.7 Convert the following code segment using switch-case construct: Var num = parseint(prompt( Enter any number )); Var txtres; { if(num>= && num<=5) txtres= Prime ; else if(num==6 num==8 num ==10) txtres = Even ; else txtres = Non Valid ; } Document.write( Result :- +txtres); Q. 8 Write a JavaScript program to print the following Pattern: (i) Output (ii) Output 6 A 5 5 A A A A A A A A A A A A A A A A A A A A Q. 9 Write a JavaScript program to print the first 1 terms of Fibonacci series. e.g; Q. 10 Write a JavaScript program to print the mathematical table from to 5. Q. 11 Write a JavaScript code to swap two numbers without using third variable. Q. 1 Write a function in JavaScript to reverse a number (1345). Q. 13 Write a function to find the sum of series. 1+1/+1/3+1/4+1/5+1/6+ upto N terms. Q. 14 Write a JavaScript program to print greatest number in 3 inputs. Q.15 Write a JavaScript program to perform the following tasks: Read an array of 10 numbers. Multiply each element of array by 5. Display the new array. ***************************

5 SUBJECT DRAWING & PAINTING Q.1. Q.. Practice Sketches of Human Figures in Drawing Copy. (5 figures). Draw on these topics: (a) Village Scene (b) Birthday Party (c) Football Match (d) Celebration of Festival SUBJECT ENGLISH 10 days English newspaper cutting of News. Review of the novel The Invisible Man. Character sketches of all the leading characters. One article / poem on any topic. ********************* SUBJECT I.P JAVA - CHAPTER NO. 3, 4, 5 (REVISION TOUR OF JAVA) MYSQL - CHAPTER NO. 13 (REVISION TOUR OF MYSQL) **************************

6 SUBJECT MATHEMATICS CLASS-XII ( Q.1. Using properties of determinants, prove that b c q r y z a p x c a r p z x b q y a b p q x y c r z. b c a a Q. Prove b c a b 4abc. c c a b Q.3. Using properties of determinants, prove that a ab ac ba b bc 4a b c ca cb c Q.4. Using properties of determinants, prove the following: x y z x y z xyz(x y(y z)(z x) x y z Q.5. Using properties of determinants, prove the following: x 4 x x x x 4 x (5x 4)(4 x). x x x 4 Q.6 Using properties of determinants, solve the following for x: x x 3 3x 4 x 4 x 9 3x 16 0 x 8 x 7 3x 64 Q.7. Prove, using properties of determinants x y z x y z y z x y (x y z) z x z x y a 1 ab ac Q.8. Prove using properties of determinants ab b 1 bc 1 a b c Q.9. Prove that 3 ca cb c 1 ( )( )( )( ) 1 x 1 1 Q.10. Using properties of determinants, prove that 1 1 y 1 xyz xy yz zx z

7 x 3 Q.11. Show that if x y z and y y 1 y 0, then 1 + xyz = 0 z x z 1 x 1 z Q.1. Use product to solve system of equations x y + z = 1; y 3z = 1; 3x y + 4z = 1 1 Q.13. If A 3 0 1, find A 1 using A 1 solve the following of equations 6 0 x y + z = - 3, 3x z = 0 and x + 6y = 0 Q.14 Using matrix method, solve the following system of equations , 1, x y z x y z 6 9 0, x, y,z 0 x y z Q.15. For the following matrices A and B, verify that [AB] = B A ; A = 1 4, B = [1 1] Q.16. If A 1 3, find value of A 3A + l Q.17. Express the following matrix as a sum of a symmetric and a skew-symmetric matrix and verify your result; Q.18. Using Elementary Row Transformation (ERT), find inverse of matrix Q.19. Using elementary transformation, find inverse of following matrices A

8 SUBJECT COMPUTER SCIENCE CLASS-XII ( Attempt the solved and unsolved questions based on the following topics from the chapter 'Communication and Network Concepts'. 1. Network & need of Networking. Evolution of Networking 3. Switching Techniques 4. Transmission Media 5. Data Communication Technologies 6. Types of Networks 7. Network Topologies 8. Communication Protocols 9. Wireless / Mobile Computing 10. Internet working Terms and Concepts 11. Introduction to Open Source Based Software 1. Network Security 13. Viruses Note: No need to attempt repeated questions.

Roll Number SET NO. 42/1

Roll Number SET NO. 42/1 Roll Number SET NO. 4/1 INDIAN SCHOOL MUSCAT FIRST TERM EXAMINATION PHYSICS CLASS: XII Sub. Code: 04 Time Allotted: Hrs 0.04.018 Max. Marks: 70 General Instructions: 1. All questions are compulsory. There