Friday, August 31, 2018

Chemistry 2018 series B solved question paper for 10 + 2 class


              SPECIAL INSTRUCTIONS:-
                             विशेष निर्देश:-

1: you must read question paper series in the circle at the top left side of your answer book.

2: While answering your questions you must indicate on your answer the same question number as appears in your question paper.

3: Do not leave blank page/ pages in your answer book.

4:  All questions are compulsory internal sources have been given in some questions.

5: Question number 1 to are 6 MCQs carrying one mark each choose one correct answer among four options.

6: Question number 7 to 10 are very short answer type question, carrying one mark each. Answer these  in about one word or one sentence.

7: Question number 11 - 17 are short answer type questions caring 2 marks each. Answer theses questions in about 30 words each.

8: Question numbers 18 to 25 are short answer type questions carrying 3 marks each. Answer these questions in about 40 words each.

9: Question number 26 to  28 are long answer type questions, carying four marks each. Answer these questions in about 50 words each.

10: Ask for log table if required.













HPBOSE 10+2 business studies series A 2018 solved.

                                 विशेष निर्देश:-
                SPECIAL INSTRUCTIONS :-

1: you must read question paper series in the circle at the top left side of title page of your answer book.

  अपनी उत्तर पुस्तिका के मुख्य पृष्ट के ऊपर बाईं अओर दिए गए वृत्त में प्रश्न पत्र सीरीज आवश्य लिखिए।

2: while answering your questions you must indicate on your answer book the same question number has appeared in your question paper.

प्रश्नों के उत्तर देते समय जो प्रश्न संख्या प्रश्न पत्र पर दर्शाई गई है, उत्तर पुस्तिका पर वही प्रश्न संख्या लिखना अनिवार्य है।

3: Do not leave blank pages in your answer book.

उत्तर पुस्तिका के.बीच खाली पन्ना/पन्ने न छोडें।

4: All questions are compulsory internal churches have been given in some questions.

सभी प्रश्न अनिवार्य हैं। कुछ प्रश्नों में आंतरिक विकल्प दिए गए हैं।




Q1: what do you mean by management?

Q2: Discuss two functions of management in brief.

Q3: Show any two characteristics of coordination ?

Q4: What is the principle of Esprit de Corps?

Q5: What do you mean by functional organisation structure?

Q6: Explain any three advantages of formal organisation?

Q7: Explain in brief the process of delegation of authority ?

Q8: write any four features of scientific management ?

Q9: Clarify the difference between recruitment and selection ?

Q10: Classify the difference between training and development ?

Q11: Explain the meaning and importance of directing ?

Q12: Explain various barriers of effective Communications?

Q13: Explain the various steps in the process of planning?
                           or
explain these under the planning:-
a) strategy
b) policies
c) procedures

Q14: Explain the limitations of controlling                                    or
Discuss the advantages and limitations of budgetary control ?

Q15: What is the meaning of capital structure ?

Q16: What is zero coupon Bond ?

Q17: What is the meaning of share market ?

Q18: Explain three points of importance of financial planning .

Q19: Explain any three functions of labelling .

Q20: Explain briefly the objectives of SEBI ?

Q21: Explain brief note on the role of marketing.

Q22: Explain the factors affecting the choice of capital structure.

Q23: what do you mean by sales promotion?what are its merits and limitations ?

Q24:explain ways and means of consumer protection available in India











Saturday, August 25, 2018

HPBOSE and CBSE board sample paper of history

                  Special instructions:-

1: All questions are compulsory
2: Give answer to 2 marks question upto 30       to 40 words.
3: Give answer to 3 marks question up to           60-80 words.
4: Give answer to 4 marks questions UpTo         100 words.
5: Give answer to 5 mark questions up to 120 words.
6: Maps should be security tied in answer books.


Q1: Indus valley civilization is known as Harappan civilization. Why?

Q2:  who was Megasthenese? 

Q3: what are the Dharma sutras and Dharma Shastra?

Q4: what is varna system?

Q5: who do you know about the religious life of rig Vedic Aryans?

Q6: examine the view “ that Buddhism was a Reform movement within Hinduism”

Q7: Abdul Faisal was careful for the reality of Ain- I- Akbari. how?

Q8: Shershah was a form runner of Akbar.comment.

Q9: who was the founder of Vijayanagar Empire and when?

Q10: what do you mean by the Bhakti movement?
Q11: who was even Battuta?

Q12: what is the permanent settlement of Bengal?
Q13: write a short note on Fort Williams 

Q14: what was Rowlatt Act?

Q15: why is Indian Constitution the longest constitution of the world?
Q16: why is Mohenjo Daro famous for?

Q17 what were the three main features of land revenue system under Mughals?

Q18: What were the causes of conflict between bahamani and Vijayanagar?

Q19: what do you know about five pillars of Islam?
Q20: who was Abdur Razzaq?

Q21: what is ryotwari system?

Q22: Access the responsibility of Dalhousie in hastening the events of 1857?

Q23: who introduced Railways in India?which were three Railways cities came into existence by this?

Q24: write four important points of Indian Constitution?
Q25:what was the nature of the revolt of 1857 
Q26: describe the role of Mahatma Gandhi in Indian National Movement?

Q27: what were the causes of the downfall of Maurya Empire?
                                 OR
write a note on fahien and his description in India?
Q28: how was the political condition of India on the eve of Bahadur invision?
                                OR
explain the central administration of Sher Shah Suri?
Q29: what were the causes of the partition of India?
                              OR
 what were the causes of rise of communalism in India?

Q30: show ashoka's Empire on the map of India.
                               OR
show the important places related to the national movement on the map of India



                           






Above we provide pdf. You may download or read from pdf.
All the data taken from cbse protal and hpbose portal

HPBOSE and CBSE Sample paper mathematics


Special instructions:-

                    विशेष निर्देश:

1:  You must write question paper series in the circle at top left side of title page of your answer sheet.

2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.

3: Don't leave blank pages/pages in your answer book.

4: All questions are compulsory.


5: Internal choices are given in some questions.

6: Question no 1-10 are MCQ carrying 1 Mark each. Question no 11-14 are short answer type carrying 2 Mark each. Question no 15-26 are short answer type questions carrying 3.5 marks each and question no 27-31 are long answer type carrying 5 marks each.


7: Use of calculator is not                                       permitted,however you ask for log table.   If required from superintendent of        examination.

8: Try to answer the questions in serial order as far as possible.

9: attach the graph properly.

All question papers are downloaded from CBSE portal





Saturday, August 11, 2018

HPBOSE 2015 mathematics series C


Special instructions:-

                    विशेष निर्देश:

1:  You must write question paper series in the circle at top left side of title page of your answer sheet.




2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.

3: Don't leave blank pages/pages in your answer book.

4: All questions are compulsory.


5: Internal choices are given in some questions.

6: Question no 1-10 are MCQ carrying 1 Mark each. Question no 11-14 are short answer type carrying 2 Mark each. Question no 15-26 are short answer type questions carrying 3.5 marks each and question no 27-31 are long answer type carrying 5 marks each.



7: Use of calculator is not                                       permitted,however you ask for log table.   If required from superintendent of        examination.

8: Try to answer the questions in serial order as far as possible.

9: attach the graph properly.









HPBOSE 2016 mathematics question paper series C


HPBOSE 2016 mathematics question paper series C


Q11: find the value of x,y and z such that
[x+y     2 ]    =[6   2]
[5+z    xy]    =[5   8]

OR

Using elementary transformation,find the inverse of  [2    -6]
                    [1    -2]

Q12: find the value of k so that function f is continuous at the indicated point:

         f(x) = kx+1 , if x<=π
                    Cos x, if x>π

Q13: find the rate change of area of a circle with respect to its radius r. When r=3cm

Q14: form a differential equation representing the family of parabola is having vertex at origin and axis along positive direction of y-axis

Q15: find gof and fog if f(x) is equal to  |x| and g(x) = |5x-2|

Q16: prove that 
                           tan-¹ 1/2 + tan-¹ 2/11 =tan-¹3/4
                                           OR
                               tan-¹ x/√a²-x² , |x| <a

Q17:  using properties of determinant prove that:

|1    x     x² |
|x²    1     x |     =   (1-x³)²
|x    x²    1  |

18: find dy/dx, when Y + sinY = cos x
                            OR
Differtiate the function
(Log x) power cos x

Q19: integrate  5x/(x+1)(x²+9)dx

Q20: integrate 5x⁴√x5+1 dx within limits -1 to 1

Q21 integrate cosx/(1-sinx)(2-sinx)dx

Q22 solve the differential equation
                     ydx + (x- y²)dy= 0
                         OR
          (x-y)dy - (x+y)dx = 0

Q23: find a unit vector perpendicular to each of the vectors a+b and a-b, where a= 3i+2j+2k and b= î+2j-2k

Q24: find the angle between the pair of lines x-2/2= y-1/5 = z+3/-3  and  x+2/-1 = y-4/8 = z-5/4
Q25: find the mean number of heads in 3 tosses of a fair coin.

Q26: two balls are drawn at random with replacement from a box containing 10 black and 8 red balls find the probability that (1)both balls are red (2) first ball is black and second is red (3)one of them is black and other is red
                  OR
Let A and B be Independent event with P(A) = 0.3 and P(B) = 0.4. find (1) probability of A intersection B (2) probability a/ b

Q27: solve the system of equations using Matrix method
3 X - 2 Y + 3Z= 8 
2 X + Y - Z = 1
 4 x - 3 Y + 2Z =4

Q28: of all closed cylindrical cans (right circular) which and close a given volume of 100cc. find the dimensions of the can which has the minimum surface area.
                 OR
Find the maximum profit which a company can make if the profit function is given by     P(x) = 41 - 24 x -18 x²

Q29: find the area of the region bounded by the two parabola y = x² and x = y²
                               OR
Find the area of the circle 4 x + 4 Y = 9 which is interior to a parabola y = 4 x

HPBOSE 2016 mathematics question paper series C

Q30: find the angle between the line x+1/2 = y/3 = z-3/6and the plane 
10 X + 2 Y - 11z=3


Q31: maximize Z equal 5 x + 3 y subject to constraints 3 X + 5 y ≤ 15 , 5 x + 2 y ≤ 10 , x≥0 y ≥0

HPBOSE 2016 mathematics question paper series C



HPBOSE 2016 English series B

Special instructions:-

                         विशेष निर्देश:-

1: You must right question paper series in the circle at the top left side of title page of the answer book.

2: while answering your questions you must indicate on your answer book the same question number as a pear in your question paper.

3: the question paper is divided into three sections A, B and C all the sections are compulsory.

4: observe word limit where ever prescribed.

                      Section A


1: read the passage given below and answer the questions that follow:-


(a) trees are the most useful gift of nature to man. Without trees it would be a very big world.Without them life would be impossible now let's see what is do for a man in olden days used for making their homes ,rafts ,Canoes and weapons they used as fuel to cook and to keep themselves warm in addition to would man was development on trees for many other things things also he got from them fruits and nuts for his food please of the Palm and other trees were used for that thatching roof the bark and leaves of trees were used for closing a number of medicines does telling material and Spices were obtained from trees.
(b) In present times also man is no less dependent on trees. He has ,no doubt invented many things that can take place of would he began to use concrete Steel glass and plastics in place of would but even then the demand for the food has increased vastly for example we need lot and lot of wood for making paper cardboard and packaging cases.

(c) trees are in valuable for another reason also the suppliers with oxygen without food no life would be possible. There is oxygen in your but it is being constantly used up and turn into carbon dioxide when animals breathe and things burn off Oxygen  is consumed carbon dioxide is produced the dangers of the trees absorb this carbon dioxide with the help of Sunlight the break it into carbon and oxygen carbon is used by Green Leaf to make starch the oxygen is released back into the air.

(d) trees also helps to cool atmosphere the lives of the trees gives out a lot of water vapours it has to cool the year when rain clouds passed through the cool yeah they condense and come down as rain that's why there is Greater rainfall over places where we have thick forest.

(e) trees are man's Best Friend they are God's greatest gift to us they are in valuable wealth of nations it is ask your duty to protect them and look after them well for every tree that is cut down we must plant at least two new trees and take care of them if we do not care for trees that you will stop caring for us and then imagine what will happen.

QUESTIONS:-
(a)
Q1: what would happen if there were no trees?
Q2: How did man in olden days make use of trees?
Q3: what different things have been invented to take place of woods?
Q4: how do trees treat the carbon dioxide produced by us?
Q5: how do trees help to cool the atmosphere?
(b) find words in the passage which have the same meaning as each word/phrase given below:-
1: extremely useful (paragraph 3)
2: substance used to change the colour of things  (paragraph 1)
3: to reduce into danser form (paragraph 4)


2 read the passage carefully and answer the questions that follow:-


1) How does television affect our life it can be very helpful to people who carefully choose that shows that they was television can increase our knowledge of the outside world there are high quality programs that help us understand many fields of study science medicine art and Samoa over television benefits very old people who can't often leave the house as well as patients in hospitals.

2) On the other hand There are several serious disadvantages of television of course it provide us a pleasant way to relax spend your free time but in some countries people was the boob tube for an average of 6 hours or more a day children stare at a television screen for more hours each day then they do anything else including study and sleeping it is clear that the tube has a powerful influence on their lives and that its influences often negative

3) Recent studies show that after watching television only for 30 seconds a person's brain relax is the same way that it does just before the person Falls asleep another effect of television is that it seems to cause for concentration.

4) Another disadvantage of that television often causes people to become dissatisfied with their lives realise does not seem as exciting to these people as the life of actors on the screen too many people television becomes more real than reality and their own life seems boring are so many people get upset or depressed when they can't solve problems in their life as quickly as Television actors seem to.

5) Before a child is 14 years old he or she views 11000 murders on Tube. He or she begin to believe that there is nothing strange about fights killing and other kind of violence many studies show that the people become more violent after watching such programs. They may even do the things that they saw in a violent show.

6) The most negative effect of "boobtube" might be the position to eat all offensive lost range and powerful need to watch television even when they don't enjoy it. Addiction to the television screen is similar to drugs or alcohol addiction people almost never believe that they are addicted.

(a) On the basis of reading of the passage make notes on it using headings and subheadings use recognisable Abbreviation wherever necessary make use of suitable format also suggest a suitable title.

(b)write the summary of the above passage in about 80 words

Section B

3) You are President of the cultural Society of your school. You are planning to organise a cultural programme. Write a notice for the school notice board inviting names of the students willing to participate in not more than 50 words.
                                OR
You have been successful in IIT entrance examination write a suitable invitation for your friends inviting them to get together to celebrate the occasion at your home

4) You  are Sahil or Swathi a Government Senior Secondary School Bilaspur. You had an educational tour to a historical place.
 Write a report of the tour for your school magazine in about 125
                      OR
You are Vanshika/ Harsh write a report on Environment Day celebrated in your school in about 125 words

5) you are Astha aur Sarthak resident of 10 the mall Shimla. Write a letter to the editor of  "The Times of India" expressing your views how discipline can be improved in educational institutions.
OR
Write a letter to the president of municipal corporation of your city informing him about the poor condition of roads and street lights in your locality. Sign yourself as Mohinder or Kalpana

6) write an article in about 150 to 200 words on "Evils of Dowry system" to be published in school magazine.
                                       OR
Write an article in about 150 to 200 words on "The value of the Games"










Section C

7) read the extract and answer the questions that follow-
 Now we will count to twelve
 and we will all keep still 
 for once on the face of the earth
 let's not speak in any language
 let's stop for one second 
 and do not move in our arms so much

QUESTIONS:-
1) name the poem and the poet?
2) what does the poet ask us to do?
3) what does he not want us to do?
4) what will counting upto twelve and keeping still help us achieve in life?
                     OR
Aunt Jennifer's Tiger prance across screen bright topaz denizens of a word world of green.
they do not fear the man we need the tree they place in sleek chivalric certainty

QUESTIONS:-
1) name the poem and poet?
2) what do aunt Jennifer's Tiger do?
3) how do the Tigers look?
4) what are the Tigers not afraid of?

8) answer the following questions in about 30 words each (any three)
1) why has the mother being compared to the late winter's moon? 
2)what does the poet want for the children of the slums? how can their lives be made to change?
3) Do think the poet advocates total in activity and death?
4)What is suggested by the image "Massive weight of Uncle's wedding band"

9) answer the following questions in about 30 words each .
1)what did Franz notice that was unusual about the school that day?

2) mention the hazards of working in the glass bangles industry?

3) what made the palace think that he had indeed fall into a rat trap?

 4)why was the office boy frustrated who did he show his anger on?

10) answer the following questions in about 150 to 200 words

 why do you think Gandhiji considered the Champaran episode to be a turning point in his life
                                  OR
 how did Douglas overcome his fear of water.

11) answer the following questions in about 125 words:-

 Do you think that the Third Level was a medium of escape for Charley? why?
OR
 Dr sadao was compelledled by his duty as a doctor to help the enemy soldier. What made Hana his wife sympathetic to him in the face of open defiance from domestic stuff?

12) answer the following questions in about 30 words each

1) what does the Third Level refer to?

2) what did the astrologers foretell as soon as the tiger king was born?

3) who is jo? how does she respond to her father's story telling? 

4) Why does derry say people are afraid of him?

HPBOSE 2016 mathematics series B

Special instructions:-

                    विशेष निर्देश:

1:  You must write question paper series in the circle at top left side of title page of your answer sheet.

2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.

3: Don't leave blank pages/pages in your answer book.

4: All questions are compulsory.


5: Internal choices are given in some questions.

6: Question no 1-10 are MCQ carrying 1 Mark each. Question no 11-14 are short answer type carrying 2 Mark each. Question no 15-26 are short answer type questions carrying 3.5 marks each and question no 27-31 are long answer type carrying 5 marks each.


7: Use of calculator is not                                       permitted,however you ask for log table.   If required from superintendent of        examination.

8: Try to answer the questions in serial order as far as possible.

9: attach the graph properly.






Q11: constructor 3 into two Matrix whose elements are given by Aij=|i-3j|
OR
Using elementary transformation find the inverse of the matrix
                          [2    5]
              A=       [1    3]

Q12: find all points of discontinuity of f where f is Defined by
f( x)= {x+1  if x≥1
            x²+1 if x<1

Q13 find the intervals in which the function f is given by
f(x)= -2x³-9x²-12x+1 is strictly decreasing.

Q14: form a differential equation representing the family of curves Y = MX where M is arbitrary constant

Q15: find gof and fog if
f(x)= 8x³ and g(x)=x⅓

Q16 prove that
           sin-¹ 3/5 – sin-¹ 8/17 = cos-¹ 84/85
                                  OR
            tan-¹(cos x - sin x/ cos x + sin x), x<π
Q17 using properties of determinants show that 

|x+y+2z           x                    y|
|z                  y+z+2x             y|     =2(x+y+z)²
|z                      x         z+x+2y|


Q18 find dy/dx for function
           (Cos x)power y = (cos y)power x
                          OR
If y=( tan-¹x)² then show that
            (x²+1)²y2 + 2x ( x² +1) y1 = 2

Q19: integrate 5 x + 3 /√ x² + 4 x + 10 with respect to x

Q20: integrate 5x/ (x + 1 )(x – 4) with respect to x

Q21 integrate | x–5|dx within limits 2 to 8

Q22 show that the family of curves for which the slope of the tangent at any point (x y) on it is x²+y²/2xy is given by x²–y² = cx
                          OR
         (x+y)dy/dx= 1

Q23.  Show that the vectors a→ = i^ – 2j^+3 k^, b→ = 2i^ + 3j^ – 4k^ and  c→ = i^ – 3 j^ + t k^ are coplanar

Q24.  Find the angles between the pair of lines

x–2/2 = y–1/5 = z+3/–3  
 and. 
x+2/–1 = y–4/8 = z–5/4

Q25. A dice is tossed thrice find the probability of getting an odd number at least once.


Q26: from a lot of 30 bulbs which include 6 defectives a sample of 4 bulbs is drawn at random with replacement find the probability distribution of the number of defective bulbs
                              OR
if a fair coin is tossed 10 times find the probability of 
1)exactly 6 heads 
2)at least 6 heads
3) at most 6 heads

Q27. Solve system of linear equations using Matrix method

2x + 3y +3z = 5
x – 2y +z = –4
3x – y –2z= 3

Q28. Show that the right circular cone of least curved surface area and given volume has an altitude equal to √2 times of the radius of base 
                              OR
find the equation of tangent and normal to the parabola y = 4 ax at point(at²,2at)

Q29. Find the area of the region bounded by ellipse   x²/4 + y²/9 =1
                                    OR
using integration find the area of bounded by triangle whose vertices are A(–1,0) B(1,3) and C(3,2)

Q30. Find the equation of plane through the line of intersection of plane X + Y + Z = 1 and 2 X + 3 Y + 4 Z = 5 which is perpendicular to plane x– y + Z = 0



Q31. Maximize z= 5x +10y
Subject to constraints
x + 2y ≤ 120
x + y ≥ 60
x – 2y ≥ 0
x,y ≥ 0

HPBOSE 2016 physics series C question paper


1: You must write question paper series in the circle at top left side of title page of your answer sheet.


2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.

3: Don't leave blank pages/pages in your answer book.

4: All questions are compulsory.

5: Internal choices are given in some questions.

6: Use log table if necessary.

7: Answer should be brief and to the point.

8: Question no 1-8 are MCQ carrying 1 Mark each. Question no 9-16 are short answer type carrying 2 Mark each. Question no 17-24 are short answer type questions carrying 3 marks each and question no 25-27 are long answer type carrying 4 marks each.








HPBOSE physics 2016 series C question paper
Q11: Calculate the value of Resistance needed to convert a galvanometer of resistance 200 ohm which gives full scale deflection for a current of 5 mA into voltmeter of range 25 volt

Q12: what are polaroids? give their applications.

Q13: what is difference between P type and n type semiconductor?

Q14: what is electromagnetic spectrum? give two uses of infrared rays.
                         OR
What are microwaves? give their one use.

Q15: why the colour of sky is blue?

Q16: why AC is more dangerous than DC ?explain.
Q17: what is the principle of potentiometer?how it is used to compare the EMF of two cell.
                           OR
find the effective EMF of the cells which are connected in series.



Q18: drive an expression for magnetic field on the axis of current carrying coil of radius 'a' at a distance 'x' from the centre of coil.

Q19: what is mass defect, binding energy and binding energy per nucleon?

Q20: find the maximum distance covered by TV – transmitting antenna of height h. what is skip zone?

Q21: what is rectification? how can a diode be used as half rectifier?

Q22: verify law of Photoelectric effect after driving Einstein's Photoelectric equation.
                         OR
 Drive and expression for de Broglie wavelength of an electron moving under potential difference of V volts

Q23 using Hygen's principle Prove the law of reflection.


HPBOSE physics 2016 series C question paper
Q24: This question is diagrammatic. Please see from photos.

Q25: state and prove Gauss Theorem. deduce Coulomb's law using Gauss Theorem.

Q26: Derive an expression for average power in LCR series circuit connected to AC supply Hence define power factor

HPBOSE physics 2016 series C question paper
Q27: state new cartesian sign convention drive an expression
                      –n1/U + n2/V = n2 – n1 /R
 when refraction occurs from denser medium at convex spherical refracting surface 
                               OR
what is meant by Dispersion of light. Prove that for a prism 

u= sin (A+∆m/r) /sin A/r where symbols have their usual meanings


                       HPBOSE physics 2016 series C question paper

HPBOSE 2013 physics series A question paper

विशेष निरृदेश :-

                       Special instructions:-



1: You must write question paper series in the circle at top left side of title page of your answer sheet.



2: While answering your questions you must indicate on your answer book the same question number as appears in your question paper.

3: Don't leave blank pages/pages in your answer book.

4: All questions are compulsory.

5: Internal choices are given in some questions.

6: Use log table if necessary.

7: Answer should be brief and to the point.

8: Question no 1-8 are MCQ carrying 1 Mark each. Question no 9-16 are short answer type carrying 2 Mark each. Question no 17-24 are short answer type questions carrying 3 marks each and question no 25-27 are long answer type carrying 4 marks each.






Q9: How will you represent a resistance of 3700+10% ohm by color

Q10: Give four properties of electric lines of forces.





Q11: What is the number of electrons that constitutes a current of one ampere in one second.?

Q12: What are diamagnetic substance? Write any two properties of diamagnetic substance?

Q13: Define self inductance of a coil. Write it's S.I. units.

Q14: Why convex mirror is used as driver mirror? What are it's drawback.

Q15:  The refractive index of a mirror is 4/3. How much time will light take to travel through a water column of length 500m.

Q16: Give the logic symbol,boolean expression and truth table for NOR gate.

Q17: What is potentiometer? Explain how it is used to compare the EMF of two cells?


Q18: derive an expression for the force on a charge  'q' moving with velocity 'v' in a magnetic field B. Discuss the cases when force is maximum and minimum.

Q19:  What are electromagnetic waves? Give their three characteristics.

Q20:. What is total internal reflection? Under what conditions does it takes place?

Q21: If 'h' is planks's constant, find the momentum of a photon of wavelength 0.1A°
OR
Derive an expression for de-Broglie wavelength associated with an electron accelerated from rest through potential difference' V' volt.


Q22.: Define the term half life of a        radioactive substance and obtain it's relation with decay constt.

Q23: Distinguish bet n-type and p-type semiconductors on the basis of energy band diagram

Q24: Greater is the hight of TV transmission antenna, greater is its range. Prove

Q25:   State and prove Gauss's theorem in                electrostatics and by using it, deduce an expression for the electric field at a point due to line charge.
OR
Deduce the effect of introducing dielectric slab bet. Plates of parallel plate capacitor,on the capacitance of parallel plate capacitor.

Q26: Define impedance and derive an expression for it in LCR- series circuit. What will be the impedance of LCR-circuit at resonance.

Q27: What is compound microscope? With the help of a ray diagram,explain it's working. Find an expression for its magnifying power.