PH 100 Engineering Physics Model Question paper
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY FIRST SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2015
PH 100 Engineering Physics
Part- A
Answer all questions . Each question carries 2 marks
1. What is amplitude resonance? What is the condition of amplitude resonance?
2. Will a 4 meter long string stretched between two points support waves of λ = 33 cm.
Justify your answer.
3. State Rayleigh's criterion for resolution of spectral lines in the case of grating.
4. What will happen to the diameter of the Newtons rings when the air film is replaced by
water?
5. What is Meissner effect ?
6. What is quarter wave plate?
7. Write the expressions for the linear operators corresponding to the energy E and
momentum p of a system.
8. Distinguish between Bosons and Fermions.
9. What do you mean by intensity and loudness of sound.
10. What is magnetostriction effect?
11. What is population inversion?
12. What are photo voltaic cells ?
( 12 X2 = 24 Marks
) Part- B
Answer any 12 questions . Each question carries 2 marks
13. Obtain the One-dimensional differential wave equation and its solution.
14. Establish the equation of motion of a forced harmonic Oscillator.
15. An air wedge illuminated by light of wavelength of 6000A°. Find the angle of wedge? (
There are 10 fringes in 1cm)
16. How many lines per meter there in a plane diffraction grating which gives in the second
order of an angle of diffraction 30 degree for the light of wave length 520nm incident
normally on it?
17. A quarter wave plate is to be made of quartz. The refractive indices of quartz for blue
light of wavelength 434nm are n0=1.5539 and ne=1.5634.Calculate the required
thickness.
18. Unpolarised light is falling on a Nicol prism. Polarised light emerging from it falls on
another crossed Nicol.If the crossed Nicol is rotated through 30°, calculate the
percentage of incident light transmitted.
19. Calculate the de Broglie wavelength of an electron whose kinetic energy is 10 KeV.
20. Electrons cannot be occupied inside the nucleus. Justify the statement with proof.
21. Write any 5 applications of ultrasonic waves.
22. Derive Sabine’s formula for reverberation time and explain its importance.
23. Distinguish between spontaneous and stimulated emission
24. Draw and explain the V-I characteristics of a phototransistor.
( 10 X4 = 40 Marks
) Part- C
Group -1: Answer any 3 questions . Each question carries 6 marks
25. Derive the expression for fundamental frequency of transverse vibrations in a stretched
string.
26. Explain the action of a plane transmission grating. Derive the grating equation.
27. Discribe the construction and working of Nicol prism
28. Obtain Schrodinger’s time dependent equation
( 3 X6 = 18 Marks )
Group -2 : Answer any 3 questions. Each question carries 6 marks
29. How is magnetostriction effect used to produce ultrasonic waves?
30. Explain the factors affecting acoustics of a building. How can we rectify these factors
while constructing a building?
31. Explain with necessary theory the working details of any four-level laser.
32. What is the principle of fiber optic cable?Derive an expression for numerical aperture.
( 3 X6 = 18 Marks )
Answer all questions . Each question carries 2 marks
1. What is amplitude resonance? What is the condition of amplitude resonance?
2. Will a 4 meter long string stretched between two points support waves of λ = 33 cm.
Justify your answer.
3. State Rayleigh's criterion for resolution of spectral lines in the case of grating.
4. What will happen to the diameter of the Newtons rings when the air film is replaced by
water?
5. What is Meissner effect ?
6. What is quarter wave plate?
7. Write the expressions for the linear operators corresponding to the energy E and
momentum p of a system.
8. Distinguish between Bosons and Fermions.
9. What do you mean by intensity and loudness of sound.
10. What is magnetostriction effect?
11. What is population inversion?
12. What are photo voltaic cells ?
( 12 X2 = 24 Marks
) Part- B
Answer any 12 questions . Each question carries 2 marks
13. Obtain the One-dimensional differential wave equation and its solution.
14. Establish the equation of motion of a forced harmonic Oscillator.
15. An air wedge illuminated by light of wavelength of 6000A°. Find the angle of wedge? (
There are 10 fringes in 1cm)
16. How many lines per meter there in a plane diffraction grating which gives in the second
order of an angle of diffraction 30 degree for the light of wave length 520nm incident
normally on it?
17. A quarter wave plate is to be made of quartz. The refractive indices of quartz for blue
light of wavelength 434nm are n0=1.5539 and ne=1.5634.Calculate the required
thickness.
18. Unpolarised light is falling on a Nicol prism. Polarised light emerging from it falls on
another crossed Nicol.If the crossed Nicol is rotated through 30°, calculate the
percentage of incident light transmitted.
19. Calculate the de Broglie wavelength of an electron whose kinetic energy is 10 KeV.
20. Electrons cannot be occupied inside the nucleus. Justify the statement with proof.
21. Write any 5 applications of ultrasonic waves.
22. Derive Sabine’s formula for reverberation time and explain its importance.
23. Distinguish between spontaneous and stimulated emission
24. Draw and explain the V-I characteristics of a phototransistor.
( 10 X4 = 40 Marks
) Part- C
Group -1: Answer any 3 questions . Each question carries 6 marks
25. Derive the expression for fundamental frequency of transverse vibrations in a stretched
string.
26. Explain the action of a plane transmission grating. Derive the grating equation.
27. Discribe the construction and working of Nicol prism
28. Obtain Schrodinger’s time dependent equation
( 3 X6 = 18 Marks )
Group -2 : Answer any 3 questions. Each question carries 6 marks
29. How is magnetostriction effect used to produce ultrasonic waves?
30. Explain the factors affecting acoustics of a building. How can we rectify these factors
while constructing a building?
31. Explain with necessary theory the working details of any four-level laser.
32. What is the principle of fiber optic cable?Derive an expression for numerical aperture.
( 3 X6 = 18 Marks )
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