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

Neutron was discovered by

Question # 2

Which of the following material has smaller has life

Question # 3

An alpha particle has a charge of

Question # 4

Radioactivity

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Radioactivity was discovered by:

Question # 10

Radium was discovered by:

Question # 11

In radio-active decay, the original element which disintegrate to another element is called

Question # 12

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

Question # 13

A curie represents a very strong source of

Question # 14

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

Question # 15

The unit of decay constant is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
2 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
3 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
4 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m

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