ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 2

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 3

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

Question # 4

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Different radioactive material have

Question # 7

According to Rutherford atomic model, the positive charge in an atom

Question # 8

The nucleus left after the emission of some radiation is called:

Question # 9

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

Question # 10

The half life of uranium-238 is

Question # 11

Nuclei that have the same charge number but different mass number are called

Question # 12

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 13

How much time, theα-particle more massive than an electron

Question # 14

Neutron was discovered in

Question # 15

Fraction of the decaying atoms per unit time is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
3 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
4 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
5 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
6 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
8 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
9 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
10 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m

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