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

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

Question # 2

Mass of proton is of order of

Question # 3

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

Question # 4

U-238 present in the natural uranium is about:

Question # 5

Neutron was suggested to be in the nucleus by:

Question # 6

Which of the following material has smaller has life

Question # 7

Which of these is not a radiation detector

Question # 8

How many isotopes of helium are present?

Question # 9

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 10

Curie is a unit of

Question # 11

The most abundant isotope of neon is

Question # 12

Mass of proton is

Question # 13

A particle having the mass of electron and charge of a proton is called a

Question # 14

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

Question # 15

The reciprocal of decay constant λ of a radioactive material is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
2 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
3 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
4 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
5 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
6 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
7 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
8 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
9 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
10 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

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