Download PTU B.Sc CS-IT 2020 March 6th Sem 72783 Nuclear Physics Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) B-Sc CSE-IT (Bachelor of Science in Computer Science) 2020 March 6th Sem 72783 Nuclear Physics Previous Question Paper

1 | M-72783 (S3)-2204

Roll No. Total No. of Pages : 02
Total No. of Questions : 07
B.Sc.(CS) (2013 & onwards) (Sem.?6)
NUCLEAR PHYSICS
Subject Code : BCS-603
M.Code : 72783
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains SIX questions carrying TEN marks each and a student has
to attempt any FOUR questions.

SECTION-A
1. Answer briefly :
(a) What do you understand by nuclear spin?
(b) Calculate the mass and radius of
13
A1
27
nucleus.
(c) What is parity? What do you mean by even and odd parity?
(d) Why stable nuclei have more neutrons than protons?
(e) Which is more, atomic binding energy or nuclear binding energy?
(f) Describe the term ?internal conversion?.
(g) Calculate the half life time and mean life time of the radioactive substance whose
decay constant is 4.28?10
?4
per year.
(h) What is natural Radioactivity?
(i) What do you mean by a Q-value of a nuclear reaction?
(j) What do you mean by transmutation?
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1 | M-72783 (S3)-2204

Roll No. Total No. of Pages : 02
Total No. of Questions : 07
B.Sc.(CS) (2013 & onwards) (Sem.?6)
NUCLEAR PHYSICS
Subject Code : BCS-603
M.Code : 72783
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains SIX questions carrying TEN marks each and a student has
to attempt any FOUR questions.

SECTION-A
1. Answer briefly :
(a) What do you understand by nuclear spin?
(b) Calculate the mass and radius of
13
A1
27
nucleus.
(c) What is parity? What do you mean by even and odd parity?
(d) Why stable nuclei have more neutrons than protons?
(e) Which is more, atomic binding energy or nuclear binding energy?
(f) Describe the term ?internal conversion?.
(g) Calculate the half life time and mean life time of the radioactive substance whose
decay constant is 4.28?10
?4
per year.
(h) What is natural Radioactivity?
(i) What do you mean by a Q-value of a nuclear reaction?
(j) What do you mean by transmutation?
2 | M-72783 (S3)-2204

SECTION-B
2. Prove from wave mechanical, angular momentum, statistical and other considerations
that electrons cannot exist in the nucleus.
3. Obtain the expression for the binding energy of a nucleus based on liquid drop model.
State the semi-empirical formula. What are its achievements and limitations?
4. What are magic number nuclei? How does shell model explain the existence of magic
numbers 2,8,20 and 28 only? Give the significance of magic numbers.
5. What is the cause of radioactivity? Give various types of radioactive decays and discuss
the process involved in all the radioactive decays.
6. What is ?-decay? Show that the law of conservation of energy and momentum are not
obeyed in ?-decay. Show that neutrino hypothesis explains this discrepancy.
7. Define and explain the term nuclear reaction cross-section. What are its units? If a beam
of N
o
particles is incident on a slab of thickness x of the material, how many particles will
emerge out of the slab. Given that the slab contains n atoms per unit volume and ? is the
cross section of the reaction.








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page of Answer Sheet will lead to UMC against the Student.
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