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

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 3

The chemical properties of all the isotopes of an elements are

Question # 4

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

Question # 5

Neutron was disvovered by:

Question # 6

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

Question # 7

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 8

The chemical behaviour of an atom is determined by

Question # 9

1 amu is equal to.

Question # 10

A mass spectrograph sort out

Question # 11

Mass of proton is

Question # 12

Three quarks make:

Question # 13

Nucleon means:

Question # 14

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

Question # 15

Beta particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
4 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
5 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
6 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only

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