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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 isotopes of hydrogen are
Question # 2
Gamma rays consist of steam of
Question # 3
During the nuclear changes, the law/s of conservation that hold/s are that of:
Question # 4
When thorium nucleus emits aβ-particle, the daughter nucleus is called:
Question # 5
Examples of moderators used in a fission reactor is/are:
Question # 6
The reciprocal of decay constant λ of a radioactive material is:
Question # 7
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 # 8
The rate of decay of radioactive substance
Question # 9
Mass of proton is
Question # 10
Which are not the elementary particles?
Question # 11
The unit of decay constant is
Question # 12
When certain nucleus emits aβ-particles, is mass number:
Question # 13
Neutron was disvovered by:
Question # 14
The half life of radioactive substances depends upon
Question # 15
γ-rays behave like a particle because they explain the
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R Rahimsiddiqui Siddiqui 04 - Jul - 2024 00 Min 06 Sec 60/60 -
M Muhammad 24 - May - 2024 00 Min 09 Sec 60/60 -
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M Muhammad Haseeb 25 - Nov - 2024 02 Min 17 Sec 40/60
ECAT Physics Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | An alpha particle has a charge of |
A. +2e
B. -2e
C. -e
D. +3e
|
| 2 | How much time, theα-particle more massive than an electron |
A. 600
B. 7000
C. 5000
D. 15000
|
| 3 | 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
|
| 4 | When a nucleus emits an alpha particle, it atomic mass decreased by |
A. 2
B. 1
C. 4
D. 3
|
| 5 | The total charge of any nucleus is given as |
A. Ze2
B. Z2e
C. Z/e
D. Ze
|
| 6 | After alpha decay the atomic number of the atom |
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
|
| 7 | In radioactive decay, the new element which is formed due to the disintegration of original element is called |
A. element
B. daughter element
C. parent element
D. none of these
|
| 8 | The unit of decay constant is |
A. sex
B. sec2
C. sec-1
D. sec-2
|
| 9 | The chemical behaviour of an atom is determined by |
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
|
| 10 | The number of protons inside a nucleus is called |
A. mass number
B. atomic weight
C. atomic number
D. none of these
|
Test Questions
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alishba rasheed
03 Mar 2018easy mcqs