| 1 |
All motions are |
- A. Absolute
- B. Uniform
- C. Relative
- D. Variable
|
| 2 |
Earth orbital speed is. |
- A. 10 km/s
- B. 20 km/s
- C. 30 km/s
- D. 40 km/s
|
| 3 |
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
|
| 4 |
In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of. |
- A. 90<sup>o</sup>C
- B. Zero
- C. 120<sup>o</sup>C
- D. 45<sup>o</sup>C
|
| 5 |
If an object moves with speed of light, its mass will be. |
- A. Zero
- B. Maximum
- C. Minimum
- D. infinity
|
| 6 |
The unit of work function is |
- A. Electron volt
- B. Ampere
- C. Volt cell
- D. Hz
|
| 7 |
The energy of photon is givne by |
- A. mv2/2
- B. hf
- C. Va e
- D. mac<sup>1</sup>
|
| 8 |
By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about. |
- A. 20 ms-1
- B. 10 ms-1
- C. 2 cms-1
- D. 2 ms-1
|
| 9 |
A perfect absorber must also be perfect |
- A. Cavity
- B. Sources of radiation
- C. Radiator
- D. None of these
|
| 10 |
Wave nature of particle was given by: |
- A. Clemensen
- B. Louis de Broglie
- C. Laster H. Germer
- D. Clinton S. Davisson
|
