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 a charged particle passes through matter, it produces ionization, this effect is used in

Question # 2

An alpha particle has a charge of

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

The isotope/s of hydrogen is /are:

Question # 5

Beta particles are

Question # 6

The half life of uranium-238 is

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

The unit of decay constant is:

Question # 9

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

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

Rutherford performed an experiment on nuclear reactions in:

Question # 12

In wilson cloud chamber, the air becomes saturated with:

Question # 13

The nucleus left after the emission of some radiation is called:

Question # 14

The half lie of radium-226 is

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Which of the following material has smaller has life

Question # 19

Radioactivity was discovered by:

Question # 20

1 amu is equal to

Question # 21

Nucleon means:

Question # 22

Structure of the nucleus was explained by

Question # 23

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

Question # 24

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

Question # 25

The half life of radioactive substances depends upon

Question # 26

A pair of quark and antiquark makes a:

Question # 27

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 28

The total charge of any nucleus is given as

Question # 29

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
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
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
2 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
3 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
4 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
5 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
6 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
7 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
8 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
9 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
10 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

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