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

The figure 1.007276μ shows the mass of an:

Question # 2

1 amu is equal to.

Question # 3

There is present in paraffin a large amount of:

Question # 4

Marie curie and Pierre curie discovered:

Question # 5

Charge on neutron is

Question # 6

Which are not the elementary particles?

Question # 7

The total charge of any nucleus is given as

Question # 8

Rate of decay is actually described by.

Question # 9

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

Question # 10

Gamma rays consist of steam of

Question # 11

Radioactivity

Question # 12

The half life of radioactive substances depends upon

Question # 13

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 # 14

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 15

In wilson cloud chamber, the air becomes saturated with:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
3 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
4 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 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
7 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
8 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
9 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
10 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above

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