| 1 |
Bottom quark carries charge : |
- A. 2/3 e
- B. -2/3 e
- C. +1/3 e
- D. -1 /3 e
|
| 2 |
The amount of energy equivalent to 1 a.m.u is |
- A. 931.5 MeV
- B. 93.15 MeV
- C. 9.315 MeV
- D. 2.224 MeV
|
| 3 |
Which is true for both alpha particle and gama rays. |
- A. They cause ionization in air
- B. They can be deflected by electric field
- C. They can be deflected by magnetic field
- D. The y can penetrate a few millimeters of aluminium
|
| 4 |
The energy equivalent of 1 kg of matter is about: |
- A. 10<sup>-15</sup> J
- B. 1 J
- C. 10<sup>-12</sup>J
- D. 10<sup>-17</sup>J
|
| 5 |
Two up quarks and one down quarks makes a |
- A. Proton
- B. Newton
- C. Photon
- D. Meson
|
| 6 |
Hydrogen bomb is an example of. |
- A. Nuclear fission
- B. Nuclear fusion
- C. Chain reaction
- D. Chemical reaction
|
| 7 |
The quantity of U in the naturally occurring uranium is. |
- A. 0.2%
- B. 0.3%
- C. 0.7%
- D. 0.4%
|
| 8 |
A radio active substance has a half life of four months. 3 -fourth of the substance will decay in: |
- A. 6 months
- B. 8 months
- C. 12 months
- D. 16 months
|
| 9 |
Cosmic rays consist of |
- A. Protons
- B. High energy photons
- C. Positron
- D. All of above
|
| 10 |
The mass of protons is: |
- A. 1.675 x 10<sup>-27</sup> kg
- B. 1.693 x 10<sup>-27</sup> kg
- C. 1.673 x 10<sup>-31</sup> kg
- D. 1.673 x 10<sup>-27</sup> kg
|