| 1 |
Which of the following is an example of simple harmonic motion ? |
Motion of the simple pendulum
The motion of ceiling fan
The spining of the Earth on its axis
A bouncing ball on a floor
|
| 2 |
The process of breaking a heavy nucleus after the bombardment of neutrons into two small nuclei is called: |
Nuclear fission reaction
Nuclear fusion reaction
Nuclear Radiation
Nuclear chain reaction
|
| 3 |
Which element is used to locate the ulcer in brain? |
Iodine-131
Phosphorus-32
Carbon-14
Potassium-40
|
| 4 |
Which element is used for the monitoring of thyroid glands? |
Iodine- 131
Phosphorus-32
Carbon-14
Potassium-40
|
| 5 |
The half life of radium - 226 is 1620 years. If N is its total amount then after the four half lives, its left amount will be: |
1/2 N
1/4 N
1/8 N
1/16 N
|
| 6 |
The phenomenon in which radiations convert the matter into positive and negative ions is called: |
Radio activity
Excitation
Ionization
Electrolysis
|
| 7 |
The symbol of alpha particles is: |
4AHe
42He
0-1B
00Y
|
| 8 |
Radiations present in atmosphere due to the presence of different radioactive elements are: |
Cosmic radiations
Background radiations
secondary radiations
Electromagnetic radiations
|
| 9 |
Which radiations are free of effect of electric and magnetic field? |
Alpha
Beta
Gamma
Alpha and beta
|
| 10 |
Who discovered the phenomenon of natural radioactivity? |
Henry Becurial
Merry Curi
Perry
Rutherford
|
| 11 |
The number of neutrons in the nucleus of tritium is: |
1
2
3
4
|
| 12 |
The symbol of atomic mass number is: |
A
X
N
Z
|
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