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

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

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

The range ofβ-particle in air is greater than that ofα-particle by

Question # 4

Mass of neutron is

Question # 5

The rate of decay of a radioactive substance

Question # 6

Curie is a unit of

Question # 7

γ-rays behave like a particle because they explain the

Question # 8

Proton was discovered by Rutherford in

Question # 9

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

Question # 10

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

Question # 11

After alpha decay the atomic number of the atom

Question # 12

Which of the following material has longer half life

Question # 13

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

Question # 14

The isotope/s of hydrogen is /are:

Question # 15

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
2 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
3 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
7 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
8 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
9 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
10 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above

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