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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
00:00
Question # 1
The reciprocal of decay constant λ of a radioactive material is:
Question # 2
When certain nucleus emits aβ-particles, is mass number:
Question # 3
How much time, theα-particle more massive than an electron
Question # 4
Mass of proton is
Question # 5
If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
Question # 6
The missing mass which is converted to energy in the formation of nucleus, is called
Question # 7
After alpha decay the atomic number of the atom
Question # 8
Fraction of the decaying atoms per unit time is called
Question # 9
The distance travelled byα-particle in a medium before coming to rest, is called
Question # 10
Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
Question # 11
The energy acquired by a mass of 1g moving with the speed of light is
Question # 12
Nucleus of a hydrogen atom may contain:
Question # 13
The isotope/s of hydrogen is /are:
Question # 14
When a nucleus emits an alpha particles, its charge number decreases by
Question # 15
Which of the following material has longer half life
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ECAT Physics Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | Different radioactive material have |
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
|
| 3 | Rate of decay is actually described by. |
A. Half line
B. Decay constant
C. Mean life
D. Total life
|
| 4 | Radioactivity |
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
|
| 5 | The rate of decay of a radioactive substance |
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
|
| 6 | 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
|
| 7 | Neutron was disvovered by: |
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
|
| 8 | Examples of moderators used in a fission reactor is/are: |
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
|
| 9 | The energy acquired by a mass of 1g moving with the speed of light is |
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
|
| 10 | Binding energy per nucleus is |
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
|
Test Questions
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alishba rasheed
03 Mar 2018easy mcqs