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

00:00
Question # 1

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

Question # 2

Gamma rays consist of steam of

Question # 3

Neutrons are

Question # 4

The energy acquired by a mass of 1g moving with the speed of light is

Question # 5

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 # 6

An alpha particle has a charge of

Question # 7

There is present in paraffin a large amount of:

Question # 8

Radium was discovered by:

Question # 9

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

Question # 10

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 11

β-particles are easily deflected by collisions than heavy

Question # 12

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

Question # 13

Neutron was discovered by

Question # 14

The number of isotopes of hydrogen are

Question # 15

Charge on proton is

Question # 16

How much time, theα-particle more massive than an electron

Question # 17

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

Question # 18

Neutron was disvovered by:

Question # 19

γ-rays are

Question # 20

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

Question # 21

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 22

Phenomenon of radioactivity is due to disintegration of

Question # 23

Binding energy per nucleus is

Question # 24

U-238 present in the natural uranium is about:

Question # 25

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

Question # 26

Radioactivity

Question # 27

The isotope/s of hydrogen is /are:

Question # 28

γ-rays behave like a particle because they explain the

Question # 29

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

Question # 30

The unit of decay constant is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
2 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
7 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 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
9 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
10 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year

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