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

00:00
Question # 1

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

Question # 2

Structure of the nucleus was explained by

Question # 3

The rate of decay of a radioactive substance

Question # 4

In radio-active decay, the original element which disintegrate to another element is called

Question # 5

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

Question # 6

Radioactivity was discovered by:

Question # 7

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

Question # 8

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 # 9

There is present in paraffin a large amount of:

Question # 10

Binding energy per nucleus is

Question # 11

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

Question # 12

γ-rays behave like a particle because they explain the

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

The nucleus/nuclei of hydrogen is/are:

Question # 15

Pair production take place when energy ofγ-rays photon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
2 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
3 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
4 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
5 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
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 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
10 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen

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