| 1 |
De-Broglie waves are associated with |
- A. Moving charged particles only
- B. Moving neutral particles only
- C. All moving particles
- D. All parties whether in motion or at rest
|
| 2 |
The quantity/factor h/m<sub>o</sub>c has the dimensions of. |
- A. Length
- B. Time
- C. Mass
- D. Energy
|
| 3 |
Wave nature of light appears in |
- A. Pair production
- B. Compton effect
- C. Photo electric
- D. Interference
|
| 4 |
Einstein was awarded Nobel prize in physics in |
- A. 1905
- B. 1911
- C. 1918
- D. 1921
|
| 5 |
A perfect absorber must also be perfect |
- A. Cavity
- B. Sources of radiation
- C. Radiator
- D. None of these
|
| 6 |
The concept of direction is purely |
- A. Relative
- B. Absolute
- C. Relative to the motion
- D. None of these
|
| 7 |
Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is. |
- A. X rays
- B. Gama rays
- C. Heat Radiation
- D. Ultraviolet rays
|
| 8 |
Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is. |
- A. 4.5 eV
- B. 4.25 eV
- C. 4.75 eV
- D. 0.25 eV
|
| 9 |
If an object moves with speed of light, its mass will be. |
- A. Zero
- B. Maximum
- C. Minimum
- D. infinity
|
| 10 |
When platinum wire is heated, it changes to cherry red at temperature. |
- A. 500<sup>o</sup>C
- B. 900<sup>o</sup>C
- C. 1100<sup>o</sup>C
- D. 1300<sup>o</sup>C
|