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

γ-rays behave like a particle because they explain the

Question # 2

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 3

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 4

Neutron was suggested to be in the nucleus by:

Question # 5

Radium was discovered by:

Question # 6

Nucleon means:

Question # 7

Curie is a unit of

Question # 8

The number of isotopes of hydrogen are

Question # 9

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 10

The half lie of radium-226 is

Question # 11

When a nucleus emits an alpha particles, its charge number decreases by

Question # 12

Neutron was discovered by

Question # 13

The time required for a radioactive material to decrease in active by one half is called

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
2 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
5 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
6 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
7 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
10 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four

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