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 disvovered by:

Question # 2

The nucleus left after the emission of some radiation is called:

Question # 3

The half lie of radium-226 is

Question # 4

The figure 1.007276μ shows the mass of an:

Question # 5

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 # 6

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

Question # 7

The energy acquired by a mass of 1g moving with the speed of light is

Question # 8

Neutron was discovered by

Question # 9

There is present in paraffin a large amount of:

Question # 10

Proton was discovered by Rutherford in

Question # 11

Which of the following material has longer half life

Question # 12

The isotope/s of hydrogen is /are:

Question # 13

Binding energy per nucleus is

Question # 14

When a nucleus emits an alpha particles, its charge number decreases by

Question # 15

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
2 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
3 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
4 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
5 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
6 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
7 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
8 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
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas

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