TNPSC Atomic and Nuclear Physics Multiple Choice Questions - 2

Question: 6

The GM tube is filled with ______ at low pressure.

(A) Vacuum

(B) Mercury

(C) Sodium

(D) Argon

Question: 7

Positive rays of the same element produces two different traces in a Bainbridge mass spectrometer. The positive ions have

(A) different mass with same velocity

(B) different mass with different velocity

(C) same mass with same velocity

(D) same mass with different velocity

Question: 8

Control rods are used to

(A) initiate the chain reaction

(B) reflect the escaping neutrons back into the reactor

(C) control chain reaction

(D) slow down the fast neutrons

Question: 9

In pressurised heavy water reactors _____ is used as fuel.

(A) thorium oxide

(B) plutonium oxide

(C) polonium oxide

(D) uranium oxide

Question: 10

The fast neutrons can be turned to slow neutrons using

(A) reflectors

(B) converters

(C) moderators

(D) control rods