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

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

Question # 2

Charge on proton is

Question # 3

Radioactivity was discovered by

Question # 4

The diameter of an atom is of the order

Question # 5

Beta particles are

Question # 6

The half lie of radium-226 is

Question # 7

Examples of moderators used in a fission reactor is/are:

Question # 8

After alpha decay the atomic number of the atom

Question # 9

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

Question # 10

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 11

Mass of proton is of order of

Question # 12

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

Question # 13

The rate of decay of radioactive substance

Question # 14

Three quarks make:

Question # 15

The half life of uranium-238 is

Question # 16

Nucleus consists of

Question # 17

When certain nucleus emits anα particle, its mass number:

Question # 18

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 # 19

Radioactivity is

Question # 20

How many isotopes of helium are present?

Question # 21

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

Question # 22

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

Question # 23

Which are not the elementary particles?

Question # 24

Which of the following material has smaller has life

Question # 25

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

Question # 26

Alfa particles are

Question # 27

The most abundant isotope of neon is

Question # 28

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

Question # 29

Binding energy per nucleus is

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
2 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
3 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
4 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
5 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
6 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
7 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
8 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
9 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
10 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick

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