| 1 |
GM counter uses |
- A. Alcohol only
- B. Bromine
- C. argon
- D. Neon and bromine
|
| 2 |
The potential difference between the top and bottom of a cloud chamber is of the order of |
- A. 290 v
- B. 400 v
- C. 1 kv
- D. None of above
|
| 3 |
When gama rays are emitted, the nuclear mass. |
- A. Decreases by 4 units
- B. Does not change
- C. Increases by 2 units
- D. Increase by 1 unit
|
| 4 |
Nuclear fission was discovered by: |
- A. Otto Hahn
- B. Friz strassmann
- C. Both a and b
- D. Michaelson
|
| 5 |
The SI unit of decay constant is |
- A. m
- B. m<sup>-1</sup>
- C. S<sup>-1</sup>
- D. Nm<sup>-1</sup>
|
| 6 |
The unit of radioactivity is: |
- A. Bequerel
- B. Henry
- C. Pascal
- D. Joule
|
| 7 |
The energy of photon for photoelectric effect is less than |
- A. 1 MeV
- B. 2 MeV
- C. 5 MeV
- D. 8 MeV
|
| 8 |
The particles equal in mass but greater than proton are. |
- A. Mesons
- B. Baryons
- C. Leptons
- D. Hadrons
|
| 9 |
The mass of proton in amu is: |
- A. 1.07276
- B. 1.7276
- C. 1.007276
- D. 1.0007276
|
| 10 |
The first atomic reactor was introduced by |
- A. Currie
- B. Enrico Fermi
- C. Newton
- D. Bohr
|