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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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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 21 Nuclear Physics
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Question # 1
The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
Question # 2
In radio-active decay, the original element which disintegrate to another element is called
Question # 3
Beta particles are
Question # 4
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 # 5
The isotope/s of hydrogen is /are:
Question # 6
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
Question # 7
The diameter of an atom is of the order
Question # 8
Neutron was suggested to be in the nucleus by:
Question # 9
A particle having the mass of electron and charge of a proton is called a
Question # 10
Mass of proton is
Question # 11
Nucleus of a hydrogen atom may contain:
Question # 12
Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
Question # 13
When a nucleus emits an alpha particles, its charge number decreases by
Question # 14
Alfa particles are
Question # 15
Pair production take place when energy ofγ-rays photon is
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ECAT Physics Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The chemical properties of an element depends upon the number of |
A. electron
B. position
C. photons
D. neutrons
|
| 2 | Rate of decay is actually described by. |
A. Half line
B. Decay constant
C. Mean life
D. Total life
|
| 3 | If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by |
A. -4
B. 4
C. 2
D. 1
|
| 4 | Neutron was discovered in |
A. 1915
B. 1920
C. 1925
D. 1932
|
| 5 | Which are not the elementary particles? |
A. Photons
B. Leptons
C. Hadrons
D. Quarks
|
| 6 | When radioactive nucleus emits aβ-particle, the proton-neutron ratio |
A. decrease
B. increase
C. same
D. none of these
|
| 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 rate of decay of radioactive substance |
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
|
| 9 | Neon gas have three isotopes whose atomic numbers are |
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
|
| 10 | 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
|
Test Questions
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alishba rasheed
03 Mar 2018easy mcqs