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SIXTH SEMESTER (CUCBCSS-UG) DEGREE EXAMINATION, MARCH 2022

Physics/Applied Physics

PHY 6B 12/APY 6B 13—NUCLEAR PHYSICS, PARTICLE PHYSICS AND ASTROPHYSICS

Time

ae SY ‏سب‎

(2014—2018 Admissions)

: Three Hours Maximum : 80 Marks

Section A (Answer in a word or phrase)

Answer all questions.
Each question carries 1 mark.

Charge of u quark is —————_.
The empirical formula for the nuclear radius is ‏لل ل‎

The total amount of energy radiated from a star from its surface per second is called

The hydrogen isotope — is radioactive.

A particle and antiparticle possess the same

Question 6 to 10: Write True or false:

6.
7
8.

10.

11%
12.
13.

Neutrino possesses a mass.
Tokamak is used for the confinement of plasma.

The principle of a betatron is the use of cross electric and magnetic fields so as to accelerate charged

particles.
A scintillation counter is very fast in response.
Ionisation chamber is used to accelerate charged particle.
(10 x 1 = 10 marks)
Section B (Answer in two or three sentences)

Answer all questions.

Each question carries 2 marks :
What are baryons and leptons ?
Mention some of the uses of a nuclear reactor.

Explain decay constant.
Turn over

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