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 nucleus left after the emission of some radiation is called:

Question # 2

Alfa particles are

Question # 3

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

Question # 4

Charge on proton is

Question # 5

The most abundant isotope of neon is

Question # 6

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

Question # 7

The number of isotopes of hydrogen are

Question # 8

The half lie of radium-226 is

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

Neutrons are

Question # 13

Electrons are

Question # 14

Curie is a unit of

Question # 15

Beta particles are

Question # 16

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 17

U-238 present in the natural uranium is about:

Question # 18

1 amu is equal to

Question # 19

The range of particle depends upon the factor

Question # 20

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 # 21

The rate of decay of radioactive substance

Question # 22

Binding energy per nucleus is

Question # 23

γ-rays are

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Three quarks make:

Question # 28

Rate of decay is actually described by.

Question # 29

How many isotopes of helium are present?

Question # 30

An alpha particle has a charge of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
2 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
3 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
4 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
5 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
6 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
7 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
8 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
9 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
10 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino

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