PU / Pre University Physics Model Question Paper : www.pue.kar.nic.in Karnataka

[mariammal]

Document Described : Physics Question Paper, Karnataka Question Paper

PHYSICS
Time : 3 Hours 15 Minutes ] [ Max. Marks : 90
Note :
i) Numerical problems solved without writing the relevant formulae carry no marks.
ii) Answers without relevant diagram / figure / circuit wherever necessary will not carry any marks.

http://pue.kar.nic.in/PUE/support_ht...htm#youranchor
http://pue.kar.nic.in/PUE/PDF_files/...r/2010J/33.pdf

PART – A :
I. Answer all the following questions : 10 × 1 = 10
1. When a ray of white light passes through a prism which colour is most deviated ?
2. Write the condition for constructive interference in terms of phase difference between two interfering waves of light.
3. Name the phenomenon which illustrates the transverse nature of light.
4. Give the expression for the speed of light in terms of its frequency and wavelength.
5. Two point charges q 1 and q 2 are such that q 1 q 2 > 0. What is the nature of the force between the charges ?
6. Define emf of a cell.
7. Which law of Kirchhoff related to frequency signifies conservation of energy ?
8. What are quarks ?
9. Mention any one application of LED.
10. Write the Boolean equation for OR logic gate.

PART – B :
II. Answer any ten of the following questions : 10 × 2 = 20
11. Draw a neat diagram to show refraction of a ray of monochromatic
light passing through a prism in the position of minimum deviation.
12. Who proposed quantum theory of radiation ? Give the expression for energy associated with a photon.
13. Calculate the fringe width of the interference pattern from the following data :
Wavelength of the light ? = 678 nm
Distance between the slits d = 0·35 mm
Distance between the slits and the screen D = 1 m.
14. State and explain Gauss theorem in electrostatics.
15. With a neat diagram of a cylindrical capacitor, write an expression for its capacitance.
16. Draw a circuit diagram of Wheatstone's network. Give the condition for balance of a Wheatstone's network.
17. Define the terms 'magnetic dip' and 'horizontal component of earth's magnetic field'.
18. State Faraday's laws of electromagnetic induction.
19. What are Fraunhoffer lines ? What is the type of spectrum of sunlight observed during total solar eclipse ?
20. What are coherent scattering and incoherent scattering ?
21. Give any two properties of LASER.
22. Mention two types of liquid crystals.

PART – C :
III. Answer any one of the following questions : 1 × 5 = 5
23. Derive the relation connecting u, v, n and R for refraction at a spherical surface concave towards a point object in denser medium, where the symbols have their usual meaning.
24. Explain double refraction with a neat diagram. Distinguish between the ordinary ray and the extraordinary ray with specific reference to
(i) the speed of light and (ii) the plane of polarisation.

IV. Answer any two of the following questions : 2 × 5 = 10
25. What is meant by equivalent resistance ? Obtain an expression for the effective resistance of three resistors connected in series.
26. Obtain an expression for the current in a series LCR circuit, with the appropriate phase diagram.
27. Give Einstein's explanation of photoelectric effect.

V. Answer any two of the following questions : 2 × 5 = 10
28. State the postulates of Bohr's theory of hydrogen atom.
29. a) Define the following terms:
i) Decay constant
ii) Half-life of a radioactive element.
b) Assuming N = No e–?t obtain an expression for half-life period of
a radioactive element in terms of its decay constant.
30. Distinguish between conductors, semiconductors and insulators on the basis of Band theory of solids.

VI. Answer any three of the following questions : 3 × 5 = 15
31. A parallel sided glass slab of thickness 0·25 m having refractive index of 1·524 is completely immersed in water of refractive index 1·333. A ray of light is incident on it at an angle of 40°. Calculate the lateral shift produced.
32. A point charge of 20 µC is situated at a point O. A and B are points 0·05 m and 0·15 m away from this charge. Find the potential at A and B. Also find the work done to move a point charge of 1·6 8 10–19 C from B to A.
33. A galvanometer of resistance 50 ? requires a current of 2 mA for full scale deflection. How do you convert it into
a) an ammeter of range 0 – 3A and
b) a voltmeter of range 0 – 5V ?
34. Calculate the energy released in kilowatt-hour ( kWh ) when 0·2 kg of 92 U235 undergoes fission completely. Assume that the average energy released per fission of 92 U235 nucleus is 200 MeV.

VII. Answer any one of the following questions : 1 × 5 = 5
35. Describe an experiment to determine the refractive index of the material of a convex lens by finding its focal length by shift method and radius of curvature by Boy's method.
36. Describe an experiment to determine the specific heat of a liquid using Joule's calorimeter.

PART – D :
IX. Answer any one of the following questions : 1 × 10 = 10
39. a) In an experiment with a microscope, light of wavelength 4240Å is used. The limit of resolution is found to be 3 × 10 –7 m. What is the semivertical angle ? 4
b) What are matter waves ? Give the expression for de Broglie wavelength in terms of linear momentum of the particle. Give the principle of electron microscope. 4
c) Name the devices working on the principle of self-induction and mutual induction. 2
40. a) In an atom, an electron encircles in a path of radius 5·1 × 10 –11 m producing a magnetic field of 13·4 tesla at the centre of the orbit. Given the charge of electron to be 1·6 × 10 –19 C, calculate the frequency of the electron in its orbit. 4
b) Derive the expression for energy stored in a charged capacitor. 4
c) Mention the conditions for sustained interference pattern. 2

[Guest]

I want 1st PU science physics practical question and answer paper.

[Guest]

If we read all the model papers which is given for 90 marks is that enough for 1st puc final exam.

[Guest]

DEAR SIR,
I AM SWATHI DV STUDENT OF MES.PROF.B.R.SUBBA RAO PU COLLEGE REQUESTING YOU TO SEND THE BOARD PAPER PATTERN
I AM HANDICAP PLEASE HELP FOR GIVING ADVICE OF CHAPTER QUESTION PAPER&PAPER PATTERN TODAY ITSELF.
THANK YOU
YOUR FAITHFUL
2012ES197

[Guest]

I request you please upload the 1st puc all model paper and blue print pcmb.

[Guest]

What is vt graph?
Relation connecting n,u,v and R for refraction at a spherical surface

[Guest]

I REQUEST YOU TO SEND THE PHYSICS STUDY MATERIALS WHICH HAD COME FROM KARNATAKA BOARD RECENTLY WITH ANSWERS.

[Guest]

I want model question papers of first year PU : Physics, Mathematics and Biology

[Guest]

Please upload II PUC science PCMS question papers of march and July 2012.

[Unregistered]

I need economics and computer science model question paper for 2nd puc commerce section

D.S.Sahana

[Unregistered]

How can i obtain 2nd puc ncert model question paper from board?

[Unregistered]

I am jahanAvi rao..
I WANT NOTES for current electricity

[Unregistered]

Computer science model questioned papers 2014

[Unregistered]

I request you to upload important numerical chapter wise for 2nd PU exam