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

Which of the following material has smaller has life

Question # 2

In wilson cloud chamber, the air becomes saturated with:

Question # 3

Mass of proton is

Question # 4

The unit of decay constant is

Question # 5

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

Question # 6

Mass of proton is of order of

Question # 7

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

Radium was discovered by:

Question # 10

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 # 11

Neutron was discovered by

Question # 12

The half life of uranium-238 is

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

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

Question # 15

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
4 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
7 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
8 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
9 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
10 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral

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