ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Radium was discovered by:

Question # 4

The chemical properties of an element depends upon the number of

Question # 5

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

Question # 6

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 # 7

After alpha decay the atomic number of the atom

Question # 8

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 9

The isotope/s of hydrogen is /are:

Question # 10

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

Question # 11

The unit of decay constant is:

Question # 12

1 amu is equal to

Question # 13

Curie is a unit of

Question # 14

The range of particle depends upon the factor

Question # 15

γ-rays behave like a particle because they explain the

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
3 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
4 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
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
6 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
7 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
8 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
9 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
10 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2

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