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

A curie represents a very strong source of

Question # 2

When certain nucleus emits anα particle, its mass number:

Question # 3

Nuclei that have the same charge number but different mass number are called

Question # 4

Radiation detector are used to

Question # 5

Neutron was disvovered by:

Question # 6

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

Question # 7

Structure of the nucleus was explained by

Question # 8

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

Question # 9

Nucleon means:

Question # 10

The emission of radiations take place in elements, having charge number greater than

Question # 11

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 12

Heavy water is made of one oxygen atom and two atoms of:

Question # 13

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

Question # 14

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

Question # 15

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
3 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
4 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
5 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 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
10 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them

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