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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
A mass difference of 0.0012 u is equivalent to and energy of:
Question # 2
The total charge of any nucleus is given as
Question # 3
In wilson cloud chamber, the air becomes saturated with:
Question # 4
The missing mass which is converted to energy in the formation of nucleus, is called
Question # 5
The number of protons inside a nucleus is called
Question # 6
Alfa , beta and gamma rays are emitted from a radio-active substance
Question # 7
When thorium nucleus emits aβ-particle, the daughter nucleus is called:
Question # 8
Neon gas have three isotopes whose atomic numbers are
Question # 9
Neutron was suggested to be in the nucleus by:
Question # 10
The half lie of radium-226 is
Question # 11
The chemical behaviour of an atom is determined by
Question # 12
Mass of proton is
Question # 13
A curie represents a very strong source of
Question # 14
Charge on proton is
Question # 15
In radioactive decay, the new element which is formed due to the disintegration of original element is called
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ECAT Physics Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | β-particles are easily deflected by collisions than heavy |
A. α-particles
B. β-particles
C. γ-particles
D. none of these
|
| 2 | The range ofβ-particle in air is greater than that ofα-particle by |
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
|
| 3 | 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
|
| 4 | The time required for a radioactive material to decrease in active by one half is called |
A. half time
B. half life
C. disintegration time
D. mean life
|
| 5 | According to Rutherford atomic model, the positive charge in an atom |
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
|
| 6 | 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
|
| 7 | The unit of decay constant is |
A. sex
B. sec2
C. sec-1
D. sec-2
|
| 8 | In wilson cloud chamber, the air becomes saturated with: |
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
|
| 9 | 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
|
| 10 | The number of isotopes of hydrogen are |
A. 2
B. 1
C. 3
D. 4
|
Test Questions
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alishba rasheed
03 Mar 2018easy mcqs