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

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

γ-rays are

Question # 3

Which of the following material has longer half life

Question # 4

The range of particle depends upon the factor

Question # 5

The number of all the protons and neutrons in a nucleus is known as

Question # 6

Proton was discovered by Rutherford in

Question # 7

A curie represents a very strong source of

Question # 8

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 9

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 10

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

Question # 11

The number of isotopes of hydrogen are

Question # 12

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 13

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

Question # 14

Heavy water is made of one oxygen atom and two atoms of:

Question # 15

A pair of quark and antiquark makes a:

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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 chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
3 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
4 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
5 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
6 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
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
9 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
10 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%

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