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

Curie is a unit of

Question # 2

Radioactivity was discovered by

Question # 3

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

Question # 4

The number of all the protons and neutrons in a nucleus is known as

Question # 5

Which of the following material has smaller has life

Question # 6

Mass of proton is

Question # 7

1 amu is equal to.

Question # 8

Pair production take place when energy ofγ-rays photon is

Question # 9

Radioactivity was discovered by:

Question # 10

An alpha particle has a charge of

Question # 11

According to Rutherford atomic model, the positive charge in an atom

Question # 12

Nucleon means:

Question # 13

There is present in paraffin a large amount of:

Question # 14

The range ofβ-particle in air is greater than that ofα-particle by

Question # 15

Alfa , beta and gamma rays are emitted from a radio-active substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
2 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
3 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
4 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
5 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
9 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
10 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

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