ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

When certain nucleus emits aβ-particles, is mass number:

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

The most abundant isotope of neon is

Question # 4

Charge on proton is

Question # 5

The energy is found from Einstein's mass energy relation is called

Question # 6

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

Question # 7

Radioactivity

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

After alpha decay the atomic number of the atom

Question # 10

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

Question # 11

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 12

The diameter of an atom is of the order

Question # 13

A particle having the mass of electron and charge of a proton is called a

Question # 14

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

Question # 15

A pair of quark and antiquark makes a:

Question # 16

γ-rays are

Question # 17

Nucleus of a hydrogen atom may contain:

Question # 18

The rate of decay of radioactive substance

Question # 19

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

Question # 20

Nucleus consists of

Question # 21

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 22

Radioactivity is

Question # 23

The nucleus/nuclei of hydrogen is/are:

Question # 24

The number of isotopes of hydrogen are

Question # 25

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

Question # 26

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

Question # 27

Neutron was disvovered by:

Question # 28

A mass spectrograph sort out

Question # 29

The unit of decay constant is:

Question # 30

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
2 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
3 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
4 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
5 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
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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