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

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

Question # 2

Alfa particles are

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

Radioactivity was discovered by:

Question # 5

Neutrons are

Question # 6

A curie represents a very strong source of

Question # 7

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

Question # 8

A pair of quark and antiquark makes a:

Question # 9

Neon gas have three isotopes whose atomic numbers are

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

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

Question # 12

Which of the following material has longer half life

Question # 13

The isotope/s of hydrogen is /are:

Question # 14

Which of the following material has smaller has life

Question # 15

The diameter of an atom is of the order

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
3 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
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 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
6 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
7 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
8 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
9 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
10 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4

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