ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Neon gas have three isotopes whose atomic numbers are

Question # 2

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 3

The energy is found from Einstein's mass energy relation is called

Question # 4

Radioactivity is

Question # 5

After alpha decay the atomic number of the atom

Question # 6

The rate of decay of radioactive substance

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

The total charge of any nucleus is given as

Question # 9

Examples of moderators used in a fission reactor is/are:

Question # 10

The rate of decay of a radioactive substance

Question # 11

Mass of proton is

Question # 12

Neutrons are

Question # 13

Pair production take place when energy ofγ-rays photon is

Question # 14

A particle having the mass of electron and charge of a proton is called a

Question # 15

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
2 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
4 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
5 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
8 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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