Nuclear Physics and Laser Tnpsc Study Material, Group 1 2 2a 4, VAO Group Question

You are browsing the best resource for TNPSC Group 1 Exam.

for the Aspirants who are preparing for Group 2,2A, Group 4,VAO kindly refer your Syllabus and Prepare with our site.

TUTORIALS LIBRARY

Nuclear Physics and Laser

19.

Control rods used in nuclear reactor are made of

A. Stainless steel B. Graphite C. Cadmium D. Plutonium

Answer : C. Cadmium

20.

Electrons are accelerated to very high energies by means of

A. Thyrotrons B. Cyclotrons C. Magnetrons D. Betatrons

Answer : D. Betatrons

21.

Consider the following statements:
In a molecular reactor, self-sustained chain reaction is possible , because,
1. more neutrons are released in each of the fission reactions.
2. the neutrons immedietely take part in the fission process.
3. fast neutrons are slowed fdown by graphite.
4. every neutron released in the fission reaction initiates further fission
Which of the statements are correct

A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 2,3 and 4

Answer : A. 1,2 and 3

22.

Beta Particle is

A. positively charged particles B. chargeless particles C. negatively charged particles D. None of these

Answer : C. negatively charged particles

23.

Beta particles are

A. neutrons B. protons C. electrons D. thermal neutron

Answer : C. electrons

24.

Charge of an electron is

A. 1.6 x 10^-10 coulomb B. 1.6 x 10^-27 coulomb C. 1.6 x 10^-19 coulomb D. 6.1 x 10^-19 coulomb

Answer : C. 1.6 x 10^-19coulomb

Justify your answer :
Name:
Email ID:

Justify your answer :
Name:
Email ID:

Justify your answer :
Name:
Email ID:

Justify your answer :
Name:
Email ID: