Exam Details
| Subject | atomic, nuclear physics—i and solid-state physics—i | |
| Paper | ||
| Exam / Course | physics | |
| Department | ||
| Organization | Mizoram University | |
| Position | ||
| Exam Date | 2018 | |
| City, State | mizoram, |
Question Paper
PHY/IV/04 Student's Copy
2 0 1 8
Pre-CBCS
4th Semester
PHYSICS
FOURTH PAPER
Atomic, Nuclear Physics—I and Solid-State Physics—I
Pre-revised
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. An electron in a hydrogen atom jumps from higher orbits to the fourth
orbit. The emission to it is called
Balmer series
Brackett series
Lyman series
Paschen series
PHY/IV/04 1 Contd.
2. In the cyclotron, the path followed by an accelerated ion is
straight line
circular
spiral
elliptical
3. Nuclear fission can be brought about by
neutrons only
neutrons and protons
projectiles and radiations
None of the above
4. Bragg's diffraction condition is applicable for
l d
l d
l d
all values of l
5. The ratio of Fermi energy EF to the Fermi temperature TF is equal to
Planck's constant
Boltzmann's constant
Universal constant
Rydberg constant
SECTION—B
Marks 15
Write short answers to the following questions 3×5=15
1. Explain Pauli's exclusion principle and explain its significance.
2. Explain photomultiplier tube with neat diagram.
3. Explain liquid-drop model of nucleus.
PHY/IV/04 2 Contd.
4. Differentiate among primitive cell, non-primitive cell and conventional cell
from one another.
5. Define mean free path and relaxation time.
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. Explain the origin of X-ray spectra with the help of a suitable diagram. 5
Write the importance of Moseley's law. 2
OR
Derive Einstein's photoelectric equation. How will you determine the value
of Planck's constant by using Millikan's method?
2. Explain the construction and working of GM counter. 7
OR
What is artificial transmutation? Discuss the properties of neutrons.
Classify the neutrons according to their kinetic energy. Also discuss in
brief the discovery of neutrons.
3. With a neat diagram, explain the chain fission reaction. What is
multiplication factor? Write its importance for nuclear reaction.
OR
Explain nuclear fusion with example. Explain it as the source of stellar
energy.
PHY/IV/04 3 Contd.
4. How are Miller indices determined? Show that in a cubic crystal of side
the spacing between consecutive parallel planes of Miller indices is
given by
OR
What do you mean by reciprocal lattice vectors? Derive the relation
between direct and reciprocal lattice vectors.
5. Deduce Debye's T 3 law for specific heat of solids. 7
OR
Explain Einstein's theory of specific heat and discuss its failures. 7
2 0 1 8
Pre-CBCS
4th Semester
PHYSICS
FOURTH PAPER
Atomic, Nuclear Physics—I and Solid-State Physics—I
Pre-revised
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. An electron in a hydrogen atom jumps from higher orbits to the fourth
orbit. The emission to it is called
Balmer series
Brackett series
Lyman series
Paschen series
PHY/IV/04 1 Contd.
2. In the cyclotron, the path followed by an accelerated ion is
straight line
circular
spiral
elliptical
3. Nuclear fission can be brought about by
neutrons only
neutrons and protons
projectiles and radiations
None of the above
4. Bragg's diffraction condition is applicable for
l d
l d
l d
all values of l
5. The ratio of Fermi energy EF to the Fermi temperature TF is equal to
Planck's constant
Boltzmann's constant
Universal constant
Rydberg constant
SECTION—B
Marks 15
Write short answers to the following questions 3×5=15
1. Explain Pauli's exclusion principle and explain its significance.
2. Explain photomultiplier tube with neat diagram.
3. Explain liquid-drop model of nucleus.
PHY/IV/04 2 Contd.
4. Differentiate among primitive cell, non-primitive cell and conventional cell
from one another.
5. Define mean free path and relaxation time.
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. Explain the origin of X-ray spectra with the help of a suitable diagram. 5
Write the importance of Moseley's law. 2
OR
Derive Einstein's photoelectric equation. How will you determine the value
of Planck's constant by using Millikan's method?
2. Explain the construction and working of GM counter. 7
OR
What is artificial transmutation? Discuss the properties of neutrons.
Classify the neutrons according to their kinetic energy. Also discuss in
brief the discovery of neutrons.
3. With a neat diagram, explain the chain fission reaction. What is
multiplication factor? Write its importance for nuclear reaction.
OR
Explain nuclear fusion with example. Explain it as the source of stellar
energy.
PHY/IV/04 3 Contd.
4. How are Miller indices determined? Show that in a cubic crystal of side
the spacing between consecutive parallel planes of Miller indices is
given by
OR
What do you mean by reciprocal lattice vectors? Derive the relation
between direct and reciprocal lattice vectors.
5. Deduce Debye's T 3 law for specific heat of solids. 7
OR
Explain Einstein's theory of specific heat and discuss its failures. 7