GROUP – I (Short Answer) Unit – I S. No.
a
Understanding
a
Distinguish between ionic, covalent and metallic bonds.
Apply
a
Explain the formation of metallic bonds with suitable examples.
Understanding
a
5
What is cohesive energy and obtain an expression for cohesive energy?
Apply
a
6
Explain the terms of unit cell, space lattice ,and basis.
a
7
Discuss SCC structure and obtain an expression for its packing factor.
Understanding
a
8
Explain in detail the BCC structure with suitable diagram.
Understanding
a
9
Show that FCC structure is the most closely packed of the three cubic structures.
Apply
a
10
Discuss the diamond structure and zns structure with suitable diagram.
Understanding
a
11
Discuss HCP structure and obtain an expression for its packing factor.
Understanding
a
12
What are miller indices how are they obtained?
Remembering
a
13
Derive the interplanar spacing in the case of cubic structure
Apply
a
14
Define the terms Atomic radius, coordination number and packing factor.
Remembering
a
15
Describe the crystal structures of diamond
Remembers the structures
a
16
Discuss about the forces when the two atoms are approaching each other, obtain an expression for equilibrium separation. Distinguish between ionic, covalent and metallic bonds.
Understanding
a
17
Explain the formation of metallic bonds with suitable examples.
Understanding
a
Explain the terms of unit cell, space lattice ,and basis.
Remembering
a
Derives the inter planar spacing in the case of cubic structure.
Applying
a
20
Define the terms Atomic radius, coordination number and packing factor.
Remembering
a
21
Describe the crystal structure of Nacl.
Remembers the structures
a
18 19
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Remembering
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Understanding
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Program Outcomes
ru
Explain the different types of bonding in solids with suitable examples. Discuss the forces that come into play when the two atoms are approaching each other and obtain an expression for equilibrium separation.
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1
Blooms Taxonomy Level
Questions
Unit – II S. No.
Questions
Blooms Taxonomy Level
Program Outcomes
1
What are Matter waves?Explain their properties.
Understanding
d
2
Derive an expression for de-Broglie wave length
Applying
d
3
Calculate the velocity and kinetic energy of an electron having wave length of 0.21nm.
Applying
d
4
Explain the concept of dual nature of the light
Remembering
d
5
Distinguish between Max well-Bose Einstein and Fermi –Dirac statistical distributions qualitively .
Understanding
d
6
What is an electron gas
Remembering
d
7
State of explain Heisenberg’s Uncertainty principle.
Remembering
d
8
Obtain an expression for Fermi energy T>0K
Applying
d
9
Derive an expression for density of state of electrons
Applying
d
Applying
d
Applying
d
11
Show that the wavelength associated with an electron of mass ‘m’ and kinetic energy = h / √mv2e Calculate the energies that can be possessed by a particle of mass 8.50x10-31 kg. This is placed in an infinite potential box of width 109cm?
om
10
Explain the concept of effective mass of an electron.
Remembering
d
13
Explain the physical significance of wave function.
Remembering
d
14
Show that the energies of a particle in a potential box are quantized.
Applying
d
15
Show that the kronig penny model lead to energy band structure in solids.
Understanding
e
16
What is Bloch theorem?
Remembering
e
17
What are Brilluion zones?
Remembering
e
18
What is E-K diagram?
Remembering
e
19
Derive an expression for effective mass of an electron? .
Applying
d
20
Distinguish between Max well-Bose Einstein and Fermi –Dirac statistics
Remembering
d
Blooms Taxonomy Level
Program Outcomes
Remembering
g,e
Remembering
g,e
Define the magnetization and show that B=µ(H+M)
Remembering
g,e
Define the types of polarizations in dielectrics.
Remembering
g,e
What is internal field in dielectric material?
Remembering
g,e
6
Derive an expression for internal field for a cubic dielectric crystal.
Remembering
g,e
7
Derive Claussis-Mossotti equation.
Remembering
g,e
8
Write notes on dielectric theory of feero-electricity.
Remembering
g,e
9
What is electronic polarization?Derive an expression for electronic polarisability in terms of the radius of the atom.
Remembering
g,e
10
What is piezo electricity? Write the applications of piezo electricity?
Remembering
g,e
11
What is meant by polarization mechanism in dielectrics? Discuss the different polarization mechanisms in dielectrics.
Remembering
g,e
12
Distinguish between ferroelectricity and piezo electricity.
Understanding
g,e
13
What is ionic polarization . Obtain an expression for it.
Remembering
g,e
14
Define the following i. Di-electric constant
Remembering
g,e
4 5
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3
Questions
Explain the terms: i. Di-electric constant ii Electric polarization Explain the terms: iii Displacement vector iv Electric susceptibility
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Unit – III
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S. No. 1
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12
ii Electric polarization iii Displacement vector 15 16 17 18
What is Meissner effect? Explain in detail. Distinguish a super-conductor and a normal metal, both maintained at same temperature. Explain the terms: i. Magnetic induction ii. Magnetic susceptibility What are hard and soft magnetic materials? Give their characteristic Properties and applications.
Remembering
g,e
Understanding
g,e
Remembering
g,e
Remembering
g,e
19
Write notes on anti-feero and ferri-magnetic materials.
Remembering
g,e
20
Define magnetic moment. What is Bohr magneton? Explain.
Remembering
g,e
Remembering
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Remembering
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22
What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Describe domain theory of ferromagnetism on the basis of Hysteresis curve
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21
Unit – IV
Blooms Taxonomy Level Understanding
Program Outcomes h
Remembering
I
Remembering
I
Discuss the propagation mechanism of light waves in optical fibers.
Understanding
I
5
Explain the principle behind the functioning of an optical fiber..
Remembering
I
6
Write a brief note on Einstein coefficients.
Remembering
I
7
What are the differences between a laser diode and an LED.
Remembering
H
8
Explain the principle behind propagation of light signal through an optical fiber.
Remembering
I
9
Write any three applications of optical fibers.
Remembering
I
10
Define the following terms: i) Numerical aperture ii) Acceptance angle
Remembering
I
11
Explain The critical angle at the core-cladding interface
Remembering
I
12
What do you understand by population inversion? How it is achieved?
Remembering
h
Understanding
h
Remembering
h
Remembering
h
Remembering
h
Application
I
Remembering
I
Questions
1
Explain the characteristics of LASER beam
2
Derive the expression for Acceptance angle
3
Describe the different types of fibers by giving the refractive index profiles and propagation details.
4
14 15
16
17 18
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S. No.
Derive the relation between the probabilities of spontaneous emission and stimulate emission in terms of Einstein’s coefficients. Explain the following terms:i. Spontaneous emission ii. Stimulated emission Explain the following termsiii. Pumping mechanism iv.Population inversion Mention the medical applications of lasers. Calculate the refractive indices of core &cladding of an optical fiber with a NA of .33 and their fractional differences of refractive indices being 0.02 Explain the following characteristics : i. Coherence ii. Divergence and iii. Monochromocity
19
Explain the basic principles for producing laser beam
Remembering
H
20
Write the industrial applications of lasers.
Remembering
H
21
Explain i) Life time of an energy level. processes
ii) Optical pumping
Remembering
H
Explain the advantages of optical fibers in communication.
Understanding
I
23
Write a brief note on step index optical fibers.
Remembering
I
24
Distinguish between light propagation in i) Step index and ii) Graded index optical fibers.
Remembering
I
25
What is interference? What are the conditions to get interference?
Remembering
L
26
What is Diffraction? Distinguish between Fraunhofer & Fresnel’s diffraction.
Remembering
L
27
Explain the importance of diffraction grating.
Remembering
L
28
Describe Fraunhofer diffractions due to double slit.
Remembering
L
29
Explain polarization of light wave.
Remembering
L
30
Explain double refraction in calsite crystal.
Remembering
L
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22
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Unit –V
Program Outcomes
Remembering
k
Write the important applications of Nanomaterials in medicine.
Remembering
k
3
What are Nanomaterials? Explain.
Remembering
k
4
Describe the various types of carbon Nanotubes.
Remembering
k
5
Explain the fabrication of carbon Nanotubes
Remembering
k
6
Write a detailed note on Nano science.
Remembering
k
7
Why Nanomaterials exhibit different properties? Explain.
Remembering
k
8
Describe any three processes by which Nanomaterials are fabricated.
Remembering
k
9
.Describe the important applications of nanotechnology.
Remembering
k
10
Describe the process of sol-gel and precipitation in the fabrication of nanostructures.
Remembering
k
11
Write the applications of nanotechnology in the electronic industry
Remembering
k
Uderstanding
k
Remembering
k
Describe any three processes by which Nanomaterials are fabricated.
Remembering
k
15
Describe the important applications of nanotechnology.
Remembering
k
16
Write about (i) origin of nanotechnology (ii) nanoscale.
Remembering
k
17
Discuss quantum confinement effect on nanoparticles.
Remembering
k
18
Explain how TEM can be used to characterize nanoparticles.
Remembering
k
19
Give three methods of fabrication of Nanomaterials.
Remembering
k
20
.Describe the top-down methods of fabrication of Nanomaterials.
Remembering
k
Remembering
k
Remembering
j
1
Write a short note on Nanoscience and Nanotechnology.
2
13 14
21 22
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Describe the top-down methods by which Nanomaterials are fabricated. Explain how x-ray diffraction can be used to characterize nanoparticles.
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ru
Questions
m
Blooms Taxonomy Level
S. No.
How the physical and chemical properties of Nanomaterials vary with their size? Define the term Reverberation. What is Reverberation time?
GROUP – II (Long Answer) S. No.
8 9 10 11
a
Understanding
a
Applying
The Madelung constant of KCl is 1.75. Its neighbor separation is 0.314nm. Find cohesive energy per atom (Given the repulsive exponent value = 5.77, Ionization energy of potassium = 4.1eV, Electron affinity of chlorine = 3.6eV) Explain the terms:i. Space lattice. ii. Unit cell and iii. Lattice parameters. Describe the 3-dimensional Bravais lattices in combination with crystal systems Explain the terms: i. Nearest neighborhood distance ii.Coordination number and iii. Packing fraction in crystals. Show that FCC is the most closely packed out of the three cubic structures by calculating the packing factors. Explain the structure of Diamond with a neat diagram.
a
Applying
a
Remembering and Understanding
a
Understanding
a
Understanding
a
Applying
a
Understanding
a
Applying
a
Understanding
a
+
(a) Describe NaCl structure. (b) Find the energy required to form K and Cl-ion pair from a pair of K and Cl atoms. (Given that the Ionization energy of K = 4.1 eV and Electron affinity of Cl = 3.6 eV). What do you understand by Miller indices of a crystal plane? How are they obtained. Show that in a cubic crystal the spacing (d) between consecutive parallel planes of Miller indices (h k l) is given by d = a (h2+ k2+ l2)1/2 . (a) Derive Bragg's law of X-ray diffraction. (b) A beam of X-rays is incident on an ionic crystal with lattice spacing 0.313 nm. Calculate wavelength of X-rays if the first order Bragg reflection takes place at a glancing angle of 7o48’. Describe with a neat diagram, Laue's method for the determination of crystal structure Describe, in detail, Debye-Scherrer method for the determination of crystal parameter.
15 16 17
18
19
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Understanding
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7
a
.c
6
Understanding
m
5
Program Outcomes
Derive an expression for the cohesive energy of a crystal.
ru
4
fo
3
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2
Blooms Taxonomy Level
Describe the formation of various types of primary bonds in solids with suitable examples. Describe the formation of various types of secondary bonds in solids with suitable examples. Explain the forces between the two interacting atoms when they are brought nearer to form a molecule.
or
1
Questions
1. Write notes on point defects in crystals. (a) Derive an expression for concentration of Frenkel defect in an ionic crystal. (b) If the average energy required to create a Frenkel defect in an ionic crystal is 1.35 eV, calculate the ratio of Frenkel defects at 250C and 3500C. (a)Derive an expression for density of Schottky defects in an ionic crystal. (b) Two metals have the formation energies as 0.73 eV and 0.96 eV. What will be the ratio of their vacancy fractions?
a
Applying
b
Understanding
b
Understanding
b
Understanding
c
Applying
c
Applying
c
20
(a) Write notes on line defects of crystals.
Understanding
c
21
(b) What is Burger's vector? In what direction do the Burger’s vectors lie with respect to i. An edge dislocation, ii. Screw dislocation.
Understanding
c
Unit – II
S. No.
Questions
Blooms Taxonomy Level
Program Outcomes
1
Explain the concept of dual nature of the light.
Understanding
d
2
Explain the properties of matter waves.
Understanding
d
Understanding
d
Applying
d
Applying
d
Remembering
d
Write short notes on: i. de Broglie wavelength and ii. Heisenberg's uncertainty principle. Show that the wavelength (λ) of an electron having mass (m) and K.E
11
12 13
Applying
d
Applying
d
Understanding and applying
d
Understanding and applying
d
Remembering
d
Understanding
d
Understanding
d
m
ru
(a) Explain the physical significance of wave function. (b) Find the lowest energy of an electron confined in a box of side 0.1nm each. Explain the terms: i. Phase space ii. Micro Canonical ensemble iii. Grand Canonical ensemble iv. Canonical ensemble Compare Maxwell-Boltzmann, Bose-Einstein and Fermi-Dirac statistics. (a) What is the concept of electron gas? (b) Explain Fermi-Dirac distribution function. Illustrate the effect of temperature on the distribution.
fo
10
Show that the energies of a particle in a potential box are quantized.
ld
9
or
8
w
7
Find the wavelength associated with an electron rose to a potential 1600 V. Describe the experimental verification of matter waves using Davisson-Germer experiment. Calculate the wavelength of matter wave associated with a neutron whose K.E is 1.5 times the rest mass of electron.(Given Mass of neutron = 1.676 x 10-27kg, Mass of electron = 9.1 x 1031kg, Planck's constant = 6.62 x 10-34J-sec, Velocity of light = 3 x 108m/s). (a) Derive Schrodinger's wave equation for the motion of an electron. (b) Calculate the velocity and kinetic energy of an electron having wavelength of 0.21 nm.
tu
6
h . 2mE
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5
(E) is given by λ=
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4
.c
3
Derive an expression for density of energy states.
Applying
d
15
What is Bloch theorem? Explain.
Remembering
e
Show that the Kronig-Penney model leads to energy band structure in solids.
Understanding
e
What are Brillouin zones? Explain using E-K diagram.
Understanding
e
What is effective mass of an electron? Derive an expression for the effective mass of an electron. On the basis of Band theory, how the crystalline solids are classified into metals, semiconductors and insulators. Explain, in detail, the origin of energy gap using energy band theory of solids.
Remembering and Applying
d
Understanding
e
Understanding
e
Blooms Taxonomy Level
Program Outcomes
Understanding
g
Remembering and Understanding
g
16 17 18 19 20
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Unit – III S. No.
1 2
Questions Explain the following: i. Electric Polarization ii. Polarization vector iii. Electric displacement and iv. Polarizability. What is meant by polarization mechanism in dielectrics? Discuss different polarization mechanisms in dielectrics.
Find the electric susceptibility of a dielectric gas having dielectric constant of 1.000041. What is electronic polarization? Derive an expression for electronic polarizability in terms of the radius of the atom. What is ionic polarization? Derive an expression for ionic polarizability. What is local field in a dielectric material? Derive an expression for it by Lorentz method
Remembering and Understanding Remembering and Understanding
7
Derive Clausius-Mosotti equation.
Applying
g
8
Write short notes on Ferro-electricity and piezo-electricity.
Remembering
g
Remembering
g
Applying
Remembering and Applying
g
3 4 5 6
Applying
g
Applying
g g g
16
Write about Ferrites and their applications.
Understanding
g
17
What is superconductivity? Explain the effect of temp and strength of magnetic field on a superconducting material.
Understanding
g
18
Write a note on Meissner effect relating to superconductivity.
Applying
g
19
What are Type-I and Type-II super conductors.
Applying
g
20
Discuss applications of superconductivity.
Understanding
g
21
The transition temp for lead is 8.7 K. The maximum critical field of the material is 6 × 105 A/m. If lead is to be used as a superconductor at 3 ×106 A/m, find the corresponding temperature.
g
Understanding
g
Understanding
g
Remembering
g
Understanding
g
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14
w
13
tu
12
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11
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10
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15
Explain the terms: i. Magnetic induction, ii. Magnetic susceptibility, iii. Permeability of a medium iv. Intensity of Magnetization. The magnetic susceptibility of aluminum is 2.3 x 10-5. Find its permeability& relative permeability. Explain the origin of magnetic moment. Find the magnetic dipole moments due to orbital and spin motions of an electron. What are the characteristics of diamagnetic, paramagnetic and ferromagnetic substances? Explain their behavior with the help of examples. Explain the Hysteresis curve exhibited by Ferromagnetic material on the basis of domain theory. What are hard and soft magnetic materials? Give their characteristic properties and applications. Explain the salient features of anti-Ferro and ferrimagnetic materials.
9
Applying
g
Unit – IV
Questions
Blooms Taxonomy Level
Program Outcomes
Describe and explain the phenomenon of interference of light.
Understanding
l
2
Discuss in detail interference of reflected light in thin films.
Understanding
l
3
Explain why different colors are exhibited by thin films in white light.
Understanding
l
4
Explain how Newton’s rings are formed and describe the method for determination of wavelength of light with their use.
Understanding
l
What is diffraction. Discuss the Fraunhofer diffraction at a single slit.
Understanding
l
6
What is plane transmission grating? Give the theory of a plane diffraction grating.
7
What is polarization? Explain the phenomenon of double refraction.
RememberingUnde rstanding Remembering Understanding
8
Describe the construction and working of Nicol’s prism.
Understanding
l
9
Explain the terms: i. Spontaneous emission, ii. Stimulated emission, iii. Optical pumping and iv. Population inversion.
Understanding and applying
l
S. No. 1
5
l l
13
14
15
16 17 18
l
Understanding
l
Understanding
l
Explain the characteristics of a laser beam.
Remembering
i
Write the applications of lasers.
Applying
i
Explain the principle and construction of an optical fiber.
Remembering
i
Applying
i
A step index fiber has a numerical aperture of 0.16, and core refractive index of 1.45. Calculate the acceptance angle of the fiber and refractive index of the cladding. What is Acceptance angle of an optical fiber? Derive an expression for it. Define Numerical aperture. Derive an expression for numerical aperture of an optical fiber. Describe different types of optical fibers by giving the refractive index and propagation details
om
12
Understanding and applying
i
Understanding
i
Understanding
i
Remembering
i
Blooms Taxonomy Level
Program Outcomes
Understanding
e’f
Applying
e’f
Understanding
e’f
Understanding
e’f
Understanding
e’f
Remembering Understanding Remembering Understanding
e’f
Remembering and Understanding Remembering and Applying
.c
11
What are Einstein's coefficients of radiation? Derive relation between them Explain the principle, construction and working of a Ruby laser with the help of a suitable diagram. Describe the construction of He-Ne laser and discuss with relevant ELD, working of He-Ne laser.
m
10
Discuss attenuation in optical fibers.
20
Draw the block diagram of fiber optic communication system and explain the functions of each block in the system.
fo
ru
19
i
ld
Unit – V Questions
1
Distinguish between intrinsic and extrinsic semiconductors.
4 5 6
w
tu
w .jn
3
Derive an expression for the carrier concentration of an intrinsic semiconductor. Derive an expression for carrier concentration of p-type semiconductors. Explain the variation of Fermi level with temperature in the case of p-type semiconductors. Derive an expression for carrier concentration of n-.type semiconductors. Explain the variation of Fermi level with temperature in the case of n-type semiconductors Write notes on direct band gap and indirect band gap semiconductors.
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2
or
S. No.
Explain Hall effect and its importance. Explain how a PN junction is formed
7 Draw I-V characteristic curve of PN junction diode and explain.
e’f
Applying
8
Draw and explain the energy band diagram for a p-n junction diode in an unbiased condition. (b) If the effective mass of holes in a semiconductor is 5 times that of electrons, at what temperature would the Fermi level be shifted by 15% from the middle of the forbidden energy gap? [Given that the energy gap for the semiconductor is 1.20 eV].
Understanding and applying
e’f
9
Write notes on solar cell.
Understanding
e’f
10
Explain the construction and working of LED.
Understanding and applying
e’f
11
Explain the construction and working of photo diode.
Understanding
e’f
12
Define the terms: i. Reverberation ii. Reverberation time and iii. Absorption coefficient
Remembering
j
of a material.
16 17 18 19
Applying
j
Remembering and Applying
j
Remembering
k
Remembering and Understanding
k
Write notes on: Origin of nanotechnology andNano-scale (a) Explain the principle of Nanomaterials. (b) How the physical and chemical properties of nanomaterials vary with their size. Explain top-down fabrication method using chemical vapor deposition technique. Explain Bottom-up fabrication method using sol gel technique. Explain Transmission Electron Microscopy characterization technique of nanomaterials.
Remembering
k
Understanding i
k
Applying
j
Blooms Taxonomy Level
Program Outcomes
In sodium crystal the equilibrium distance between ion is r0=2.81 A° and A=1.748. Taking n=9, calculate the potential energy per ion pair. Calculate the binding energy of NaCl of which the nearest neighbor distance is 0.324nm. Express the energy in eV and also in KJ/K mol. Modeling constant for NaCl=1.748 and n=9.5. Calculate the interplanar spacing for (3 2 1) plane in a simple cubic lattice whose lattice contacta = 4.2× m. The atomic radius of copper is 1.278 A0. It has atomic weight 63.54. Find the density of copper.
Understanding, Application
a
Understanding, Application
a
Applying
a
Calculate the ratio d100:d110:d111 for a simple cubic structure.
Applying
a
Applying
b
Understanding and Applying
b
Applying
b
Applying
b
Applying
b
Blooms Taxonomy Level
Program Outcomes
Give the list of applications of nano materials
ru
20
j
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15
Remembering
.c
14
Describe an experimental method to determine the sound absorption coefficient of a material. Discuss the factors which are affecting the architectural acoustics and suggest your remedy. (a) Explain Sabine’s formula. (b) A hall has a volume of 1500 m3. Its total absorption is equivalent to 100 m2of open window. What will be the effect on the reverberation time, if the absorption is increased by 100 m2 of pen window, by filling the hall with audience?
m
13
4 5
6
7
8 9
or
w
tu
3
w .jn
2
The Bragg’s angle in the 1st order for [2, 2, 0] reflection from Ni (BCC) is 38.2o. When x-rays of wavelength λ=1.54 Ao are employed in a diffraction experiment. Determine the lattice parameter of Ni. Monochromatic x-rays of λ=1.5Ao is incident on a crystal phase having inter planar spacing of 1.6Ao. Find the highest order for which Bragg’s reflection maximum can be seen. Calculate the glancing angle at (110) plane of a cubic crystal having axial length a=0.2nm.corresponding to the 2nd order diffraction maximum for the x-rays of wavelength 0.065nm. Find the angle at which the 3rd order reflection of x-rays of 0.79A0 wavelength can occur in a crystal of 3.04x10-8cm.
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1
Questions
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S. No.
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GROUP – III (Problem Solving)
A beam of x-ray is incident on an ionic crystal with lattice spacing 0.313nm. Calculate the wavelength of x-rays, if the first order Bragg’s reflection takes place at a glancing angle of 7048’. Unit – II
S. No.
Questions
1
2
A body at 1500K emits maximum energy at a wavelength 20,000 A0.If the sun emits maximum temperature of wave-length 5500 A0, what would be the temperature of the Sun. At what temperature we can expect a 10% probability that electrons in silver have an energy which is 1% above the Fermi energy? (The Fermi energy of silver is 5.5eV.)
Application
d
Application
d
Evaluate the Fermi function for an energy KT above the Fermi energy
Applying
d
4
Calculate the wavelength of an electron raised to a potential 1600V.
Applying
d
5
If the kinetic energy of the neutron is 0.025eV calculate its de-Broglie wavelength (mass of neutron =1.674X10-27 Kg) Calculate the energies that can be possessed by a particle of mass 8.50 x10-31kg which is placed in an infinite potential box of width 10-9cm. Calculate the wavelength of matter wave associated with a neutron whose kinetic energy is 1.5times the rest mass of electron.[Given that mass of neutron=1.676×10-27kg,mass of electron 9.1×10-31Kg,Mass of electron 9.1×10-31J-Sec,velocity of light is 3 108m/s]
Applying
d
Applying
e
7
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Find the electric Susceptibility of dielectric gas having dielectric constant of 1.000041. The electronic polarizability of dielectric material having permanent dipoles no ions is 1.5 10-40 F/m2. The density of material is 2.5 1028 atoms/m3. Calculate the di electric constant of the material. A parallel capacitor has an area of 100cm2, a plate separation of 1 cm & is charged to a potential of 100 Volts. Calculate the capacitance of the capacitor & the change on the plates.
Program Outcomes
Application
g
Understanding, Application
g
or
Applying
g
w
3
d
Blooms Taxonomy Level
ld
2
Questions
fo
1
m
Unit – III S. No.
Applying
.c
6
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3
The relative dielectric constant of Sulphur is 3.75 when measured at
6
7 8 9 10 11
12
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electronic polarisability of sulphur if the density at this temperature is 2050kg/m3. The atomic weight of Sulphur being 32. A parallel plate capacitor having area 6.45 10-4 m2 and plate separation of 2x10-3m which a potential of 12volts having dielectric constant 5.0. Compute polarization. The relative dielectric constant of Sulphur is 3.75. Calculate electronic polarizability of Sulphur if its density at this temperature is 2050 kg/m3. The atomic weight of Sulphur being 32. The magnetic susceptibility of silicon is -0.4x105. calculate the flux density and magnetic moment permit volume when placed in magnetic field intensity of 5x105a/m. Calculate magnetization and magnetic flux density if magnetic field intensity 250amp/m and relative permeability is 15. A circular 100p of copper having a diameter of 10cm carries a current of 500mA. Calculate the magnetic moment.
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5
27°C. Assuming the internal field constant υ= , calculate the
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Find relative permeability, if H=220amp/m and M=3300 amp/m. If a magnetic field of strength 300 amp/meter produces a magnetization of 4200 A/m in a ferromagnetic material, and the relative permeability of the material. The electronic polarizability of a dielectric material having no ions and Permanent dipoles is 1.5x10-40farad-m2 .The density of the material is 2.5x1028 atoms per m3.calculate the dielectric constant of the material.
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Unit – IV
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A parallel beam of light of 6000A is incident on thin glass plate of refractive index 1.5 such that the angle of refraction into the plate is 50 . Find the least thickness of the glass plate which will appear dark by reflection. In a Newton’s rings experiment, the diameter of the 5th ring is 0.30 cm and the diameter of the 15th ring is 0.62 cm. Find the diameter of the 25th ring. A convex lens on plane glass plate is exposed to a monochromatic light. The diameter of the 10th dark ring is 0.433 cm. Find the wavelength of the light use if the radius of curvature of the lens is 70 cm. Soap bubble with refractive index of 1.33 and thickness of 500 is exposed to white light what wavelengths in the visible region are reflected? What is the thickness of the thinnest film of 1.33 refractive index in which destructive interference of the yellow light (6000A ) of a normally incident beam in air can take place by reflection? Given data:Refractive index of the film, =1.33 Wavelength of yellow light =6000A =6000×10-8cm In Newton’s rings experiment, the diameter of the ring was 0.35 cm and the diameter of the ring was 0.65 cm. If the wavelength of the light used is 6000 then find the radius of curvature of the Plano- convex lens.
Blooms Taxonomy Level
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In a Newton’s rings experiment, the diameter of the ring changes from 1.45 cm to 1.25 cm. when a liquid is introduced between the lens and the glass plate. Find the refractive index of the liquid. A plane transmission grating having 4250 lines per cm is illuminated with sodium light normally. In the second – order spectrum, the spectral lines are deviated by . What is the wavelength of the spectral line? A source of light having a wavelength of 600 nm is incident on a slit with a width of 1 m. Find the angular separation between the first – order minima and maxima of either side. A plane grating having 1052 lines per cm is illuminated with light having a wavelength of 5× cm at normal incidence. How many orders are visible in the grating spectra? A grating has 6000lines/cm. find the angular separation between two wavelengths of 500nm and 510nm in the order. Find the highest order that can be seen with a grating having 15000 lines/inches. The wavelength of the light used is 600 nm. A step index fiber has a numerical aperture of .16 and core refractive index of 1.45. Calculate the acceptance angle of the fiber and the refractive index of the cladding. The refractive indices of core and cladding materials of a step index fiber are 1.48 and 1.45 respectively. Calculate i) Numerical aperture ii) Acceptance An optical fiber has a numerical aperture of .02 and a cladding refractive index of 1.59. Find the acceptance angle for the fiber in water which has a refractive index of 1.33.
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Unit – V
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For semiconductor, the Hall efficient is-68×10-5m3/Coul& electrical conductivity is 250m-1Ω-1.Calculate the density &mobility of charge carriers. For intrinsic semiconductor of band gap of 0.78eV, find carrier concentrations at 370C. [Given that the effective mass of electron=effective mass of hole=rest mass of electron.] If effective mass of holes is 5 times that of elements at what temperature would the EF be shifted by 15% from middle of forbidden gap( Eg). Given Eg=1.2ev. Calculate interstices carrier concentration for Ge at 270C. [for Ge atomic weight =72.6,Density=5400kg/m3 Band gap Eg=0.7eV] The current in P-N junction at 270c is 0.18µA when a reverse bias voltage is applied. Calculate the current when FB of 0.98 V is applied. A hall of volume 85000 m3 is found to have a reverberation time of 2.2 sec. If the area of the sound absorbing surface is 7500 m2, calculate average sound absorption coefficient.
Blooms Taxonomy Level
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A hall has a volume of 1500 m3. Its total absorption is equivalent to 100 m2 of open window. Determine the effect on the Reverberation time if the absorption is increased by 100 m 2 of open window by filling the hall with audience.
