ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

The chemical properties of all the isotopes of an elements are

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

Electrons are

Question # 6

Different radioactive material have

Question # 7

The isotope/s of hydrogen is /are:

Question # 8

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

Question # 9

Marie curie and Pierre curie discovered:

Question # 10

γ-rays are

Question # 11

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

Question # 12

In wilson cloud chamber, the air becomes saturated with:

Question # 13

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

Question # 14

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

Question # 15

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
3 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
4 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
5 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
6 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
7 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
8 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen

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