IMPORTANT QUESTIONS-II P.U.C.- PHYSICS

I. GEOMETRICAL OPTICS

  1. When lateral shift is is zero? (1M)

  2. What is TIR? And write its conditions. 2M
  3. What is an optical fiber? Mention two uses of optical fiber. 2M
  4. What is lateral shift? Mention factors in which it depends. 2M
  5. Obtain an expression for the lateral shift produced by a rectangular glass slab
       due to refraction through it? (5M)------+problem
  6. What is a normal shift? Obtain an expression for the normal shift produced an
      object in denser medium viewed from rarer medium? ( 5M)-------- +problem

  7. What is a thin prism? Write an expression for deviation produced by it. (2M)
  8. Write an expression for R.I. In terms of A&D. Of a prism. (2M)
  9. Define angular dispersion. By dispersion of light (VIBGYOR) which colour has
      least critical angle ? (2M)
10. Mention the conditions of dispersion without deviation(1M)
11. Mention the condition of dispersion without deviation. (1M)
12. Define dispersive power & obtain an expression for it. (4M)
13. Write an expression for power of spherical surface in terms of RI
      and radius of curvature.
14. Define magnification. Write an expression for magnification in terms of u and f.
      (2M)
15. Mention the difference between a convex and a concave lens . (2M)
16. Write an expression for focal length of combination of two thin lenses
      separated by a distance. (2M)
17. Derive the relation connecting n, u v& R for a refraction at a spherical surface
      for a point object in a denser medium producing a virtual image.(5M) --- +problem
18. Derive the lens maker’s formula. (5M)

II. PHYSICAL OPTICS

18. Who proposed wave theory of light? (1M)
19. Name the scientist who confirmed the existence of electromagnetic waves.(2M)
20. What is the significance of Maxwell’s electromagnetic theory of light? (2M)
21. What is a photon? Who proposed quantum theory of light? (2M)
22. What are coherent sources? Mention the condition for it. (2M)
23. What are thin films? Give one example. (2M)
24. What is the interference of light? State the condition of constructive &
      destructive interference in terms of path difference. (5M)
25. Obtain an expression for interference fringe width in a double slit
      experiment.(5M)
26. What is diffraction of light? Mention its types. (2M
27. What is a grating? Mention one application of it. (2M)

28. Distinguish between Fresnel & Fraunhofer diffraction of light. (2M)
29. Distinguish between interference & diffraction of light. (2M)
30. State & explain Raleigh’s criteria of limit of resolution .(4M)
31. Write an expression for resolving power of microscope .(2M)
32. Write an expression for limit of resolution &resolving power of telescope .
      (4M)+problem
33. Define polarisation of light.show that plane of vibration and plane of polarization in
      a tourmaline crystal. (2M)
34. What is double refraction? Distinguish between O-ray & E-ray. (2M)
35. What is a Polaroid? Mention two uses of it. (2M)
36. Define optical activity and specific rotation of optically active solution. (2M)
37. Define circularly and elliptically polarized light. (2M)
38. Define Brewster”s law.Show that reflected & refracted rays are perpendicular to
      each other at the polarising angle of incident.(5M)------ +problems
39. Name the scientist who experimentally measured the speed of light first time. (1M)
40. Give the value of speed of light by Michelson’s rotating mirror experiment. (1M)
41. Mention two importance’s of speed of light . (2M)

III ELECTROSTATICS

1. Distinguish between electric intensity & potential. (2M)
2. State Coulomb's law in electrostatics (2M)
3. Write an expression for Coulomb’s law in vector form. (2M)
4. Define one coulomb. Give SI unit of permittivity of free space. (2M)
5. Distinguish between polar and non-polar dielectrics. (2M)
6. State dielectric polarization. (1M)
7. Define electric dipoles. Write an expression for the torque acting on an electric
    dipoles. (2M)
8. State Gauss theorem. Obtain an expression for electric field at any point near the
    surface of the charged conductor using Gauss theorem. (5M)
9. State Gauss theorem. Obtain an expression for electric field at any point near the
    spherical charged conductor using Gauss theorem. (5M) ------ + problem
10. Derive an expression for the electric potential at a point due to a point charge.(5M)
     + problem
11. What is capacitance of a capacitor.? (2M)
12. Write an expression for capacity of spherical conductor. (2M)
13.How does capacitance of parallel plate capacitor depends (2M)
14. Write an expression for energy stored in a capacitor (2M)
15. Write an expression for capacitance of cylindrical capacitor. (2M)

16. Obtain an expression for effective capacitance of three capacitors in series or
     parallel.(5M) +problems

IV. CURRENT ELECTRICITY

17. State Ohms law. Mention its limitations. 2M
18. Define drift velocity. And internal resistance of cell. (2M)
19. What is a super conductor? Give an example. (2M)
20. What is a thermistor? How does resistance of a thermistor vary temp. ?2M
21. Mention two applications of a thermistor?.2M
22. Derive the expression for branch currents when two resistors are in parallel. 2M
      +problems
23. .Obtain an expression for the effective resistance of three resistors in parallel .
       5M +problems
24. Obtain an expression for the current in a resistance connected across a battery
      2M
25. State the Kirchhoff’s' laws . and mention its significance. 2M
26. Draw the circuit diagram of Wheatstone's network. Mention its balanced
      condition.2M
27. Obtain the condition for balance of a Wheatstone network by applying Kirchhoff’s'
      laws 5M +problems
28. State reduction factor of tangent galvanometer.2M
29. State & explain Laplace law.5M +problems
30. Give the initial adjustment of TG. (5M)
31. What are magnetic elements of earth? And give tangent law. (2M)
32. Give the theory of TG. 5M +problems
33. Obtain an expression for the magnetic field at any point on the axis of a circular
      coil carrying current.5M +problems
34. Write an expression for the force between two conductors carrying currents. 2M
35. Give the condition of attractive and repulsive force between two parallel
      conductor carries current. (2M)
36. State Fleming’s left hand rule 2M
37. Give the expression for torque acting on a current loop kept in a magnetic field. 2M
38. Give the theory of moving coil galvanometer. 5M +problems
39. How is galvanometer converted in to an ammeter & a voltmeter? 5M +problems
40. State & explain Faraday's laws of electromagnetic induction. 5M
41. State self induction of a coil . Mension its SI unit. 2M
42. State Fleming’s right hand rule 2M
43. Write an expression for energy stored in a coil. 2M
44. What is average e.m.f of an a.c ? Write the relation between r.m.s and peak value
      of an a.c
45. What is meant by impedance of A.C circuit 2M +problems
46. Derive an expression for the alternating e,m,f. When a coil is rotating in a uniform
      magnetic field. 5M
48. Show that the voltage leads the current by π/2 in A.C circuit containing pure
      inductance. 5M +problems
49. What is resonance in an A C circuit? 2M
50. Derive an expression for current in an AC circuit containing series LCR elements.
      5M +problems
51. Explain the terms self induction & mutual induction (2M)
52. Draw a diagram of ac meter and explain power loss in a transformer. (2M)

V MODEREN PHYSICS

1 . Name two types of electron emission.
2. What are Fraunhoffer lines? (2M)
3. Define specific charge of electron and write its value. (2M)
4. Distinguish between line spectra and band spectra. (2M)
5 . Define the term threshold wavelength & stopping potential. (2M)
6. Derive an expression for Einstein's photoelectric equation (5M) +problems
7. Define photoelectric effect .explain experimental observed facts of photoelectric
    effect (5M)
8. Mention two uses of photocell. 2M
9. State & explain postulates of Bohr's theory of Hydrogen atom. 5M
10. Derive an expression for the energy of electron in the nth Bohr orbit of the
      hydrogen atom. 5M +problems
11. Obtain an expression for the velocity & radius of the electron in the nth Bohr orbit
      of the hydrogen atom. 5M +problems
12. Derive an expression for the frequency of electron in the Bohr hydrogen atomic
      model. 5M +problems
13. What are the characteristics of nuclear force.2M
14. Explain the characteristics of a nucleus with reference to its size, charge, density
      & mass 5M
15. Give Einstein's mass energy relation 2M
16. Explain the term mass defect & binding energy curve. 5M +problems
17. Distinguish between nuclear fission & nuclear fussion. 5M
18. What is NMR? Give one application of it. (2M)
19 Give the charge of α,β & γ rays. (2M)
20. What is radioactivity? Name the types of radioactive radiations. 2M
21. Define half life period & mean life? 2M +problems
22. State Soddys group displacement laws 5M
23. State & explain laws of radioactive decay. Deduce an expression for the no. of
     atoms of radioactive element at any instant of time . 5M +problems
24.What are matter waves? Write an expression for de Broglie wavelength. (2M)
25.What is working principle of electron microscope? (2M)
26.What is scattering of light? Name the types scattering of light. (2M)
27.What is Raman effect? Mention its two uses. (2M)
28.What are stocks and anti-stocks lines ? (2M)
29. What is LASER? Give the two properties and uses of laser. (2M)
30.Draw a neat labeled diagram of ruby laser. (2M)
31.Name the types of elementary particle give an example. (2M)
32.What is a lepton? Give an example. (2M)
33.What is AND and OR gate ? give its symbol. (2M)
34.Write truth table and Boolean equation of NOT gate. (2M)
35.Name two types of liquid crystals. Give the two properties and uses of liquid
     crystals. (2M)
36. What is an emulsion? Give an example. (2M)
37. What is gel and foams ? Give an example. (2M)
38. Classify conductor, semi conductor & insulator on the basis of band theory of solid
     5M
39. Distinguish between intrinsic & extrinsic semiconductors.2M
40. Distinguish between p- type & n-type semiconductors. 2M
41. What is rectification? Explain with a circuit diagram the working of diode as full
      wave rectifier. 5M
42. What is rectifier? Explain with a circuit diagram the working of diode as half wave
       rectifier / full wave rectifier 5M
43. What is a transistor? Explain the action of a npn transistor as an amplifier .5M
44. What is a photo diode? Write the symbolic representation of it. (2M)
45. What is forward and reverse bias of a diode. (2M)