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

The diameter of an atom is of the order

Question # 2

Which of the following material has longer half life

Question # 3

The most abundant isotope of neon is

Question # 4

The rate of decay of a radioactive substance

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

In 1932 Chadwick discovered

Question # 7

Radioactivity is

Question # 8

The counter, which also provides the power to the G.M. tube is called:

Question # 9

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 # 10

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

Question # 11

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

Question # 12

An alpha particle has a charge of

Question # 13

Neutrons are

Question # 14

After alpha decay the atomic number of the atom

Question # 15

Rutherford performed an experiment on nuclear reactions in:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 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
5 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
6 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
7 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
10 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5

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