Download OU B-Tech First Year 2014 June 6004 Engineering Physics Question Paper

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)
(2)
(2)
Code No. 6004 / M
FACULTY OF ENGINEERING AND INFORMATICS

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B.E. I ? Year (Main) Examination, June 2014
Subject : Engineering Physics
(Common to all branches)
Time 3 hours
Max. Marks : 75

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Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B.
PART ? A (25 Marks)
A plane transmission grating having 5000 lines per cm. is being used under normal
incident of light. If the width of the opaque parts be double than that of transparent
parts of the grating then which order of the spectra will be absent. (2)

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ii) active medium
Define the terms, i) Population inversion
iii) pumping
3 What is photon gas? Explain.
4 The pointing vector is expressed as

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a ) b) 1 X14 c) (EATLi
).
cis
5 The number of atoms per unit cell for a
(choose the correct answer)

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a) SC, 2 b) FCC, 4 c) BCC, I
6 Distinguish between intrinsic and extrinsic semiconductors.
7 Match the following :
1 Superconductivity a) Materials at reduced size
2 Dielectric Materials b) X-ray diffraction

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3 Band theory of solids c) Magnetic field
4 Nanomaterials d) Charge storage
5 Crystal structure e)
f)
g)

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Meissner effect
Kronig-Penny model
Thin films
A) 1 e, 2 ? d, 3 ? f, 4 a, 5 ? b
B) 1 ? b, 2 ? e, 3 ? h, 4 a, 5 ? d

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C) 1 d, 2 c, 3 a, 4 ? b, 5 ? e
D) c, 2 d, 3 ? f, 4 ? e,
5-
g
8 Explain briefly the principle the CVD method.

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(
3
)
.... 2
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d) (IJXE).
crystal is
d) BCC, 3
(
3

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)
(2)
(2)
Code No. 6004 / M
FACULTY OF ENGINEERING AND INFORMATICS

--- Content provided by​ FirstRanker.com ---

B.E. I ? Year (Main) Examination, June 2014
Subject : Engineering Physics
(Common to all branches)
Time 3 hours
Max. Marks : 75

--- Content provided by​ FirstRanker.com ---

Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B.
PART ? A (25 Marks)
A plane transmission grating having 5000 lines per cm. is being used under normal
incident of light. If the width of the opaque parts be double than that of transparent
parts of the grating then which order of the spectra will be absent. (2)

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ii) active medium
Define the terms, i) Population inversion
iii) pumping
3 What is photon gas? Explain.
4 The pointing vector is expressed as

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a ) b) 1 X14 c) (EATLi
).
cis
5 The number of atoms per unit cell for a
(choose the correct answer)

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a) SC, 2 b) FCC, 4 c) BCC, I
6 Distinguish between intrinsic and extrinsic semiconductors.
7 Match the following :
1 Superconductivity a) Materials at reduced size
2 Dielectric Materials b) X-ray diffraction

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3 Band theory of solids c) Magnetic field
4 Nanomaterials d) Charge storage
5 Crystal structure e)
f)
g)

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Meissner effect
Kronig-Penny model
Thin films
A) 1 e, 2 ? d, 3 ? f, 4 a, 5 ? b
B) 1 ? b, 2 ? e, 3 ? h, 4 a, 5 ? d

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C) 1 d, 2 c, 3 a, 4 ? b, 5 ? e
D) c, 2 d, 3 ? f, 4 ? e,
5-
g
8 Explain briefly the principle the CVD method.

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(
3
)
.... 2
Code No. 60041 M

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-2
9 Explain the principle of Electron Microscope. (2)
10 A solar cell having fill factor 0.6 gives the maximum power output of 18 x 10
-3
watts. (3)

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Then calculate the product voc
Ise
PART ? B (50 Marks)
11 a) Define quarter wave plate and Half wave plate. (4)
b) Describe the construction and working of Half shade polarimeter. (6)

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12 a) Explain how coherent sources are obtained by division of wave front and
division of amplitude. (4)
b) Explain the construction and re-construction of image with a hologram. (6)
13 Describe the necessary theory of potential barrier using the Schrodinger's wave
equation and explain what is quantum tunneling. (8+2)

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14 What is Frenkel defect? Derive an expression for the concentration of Frenkal
defects in a crystal. (2+8)
15 a) Based on energy bands, distinguish between conductors, semiconductors and
insulators. (4)
b) What is Hall effect and derive the expression for the hall coefficient, carrier

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concentration and mobility?
(
6
)
16 a) Discuss the Weiss theory of ferromagnetism.

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(
7
)
b) Write the applications of ferrites.
(

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3
)
17 a) Describe the thermal evaporation method for the preparation of thin films,
(
6

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)
b) Describe the principle and working of X-ray fluorescence process. (4)
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