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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 number of all the protons and neutrons in a nucleus is known as
Question # 2
The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
Question # 3
Mass of proton is of order of
Question # 4
The counter, which also provides the power to the G.M. tube is called:
Question # 5
The missing mass which is converted to energy in the formation of nucleus, is called
Question # 6
γ-rays behave like a particle because they explain the
Question # 7
Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
Question # 8
The half life of radioactive substances depends upon
Question # 9
During the nuclear changes, the law/s of conservation that hold/s are that of:
Question # 10
In his experiment on nuclear reactions, Rutherford bombardedα particles on:
Question # 11
The reciprocal of decay constant λ of a radioactive material is:
Question # 12
The number if neutrons in the nucleus of 92U235are
Question # 13
Examples of moderators used in a fission reactor is/are:
Question # 14
Phenomenon of radioactivity is due to disintegration of
Question # 15
Electrons are
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ECAT Physics Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Fraction of the decaying atoms per unit time is called |
A. decay atom
B. decay element
C. decay constant
D. decay
|
| 2 | Different radioactive material have |
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
|
| 3 | 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
|
| 4 | Mass of proton is |
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
|
| 5 | Proton was discovered by Rutherford in |
A. 1915
B. 1906
C. 1910
D. 1920
|
| 6 | 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
|
| 7 | Marie curie and Pierre curie discovered: |
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
|
| 8 | Rate of decay is actually described by. |
A. Half line
B. Decay constant
C. Mean life
D. Total life
|
| 9 | When certain nucleus emits aβ-particles, is mass number: |
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
|
| 10 | The amount of energy equivalent to 1 a.m.u is |
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
|
Test Questions
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alishba rasheed
03 Mar 2018easy mcqs