| 1 |
The unit of work function is |
- A. Electron volt
- B. Ampere
- C. Volt cell
- D. Hz
|
| 2 |
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
|
| 3 |
Compton's effect is associated with |
- A. gamma rays
- B. Beta rays
- C. X rays
- D. Positive rays
|
| 4 |
Who explained the photo electric effect. |
- A. Max Plank
- B. Einstein
- C. Henry
- D. Rutherford
|
| 5 |
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
|
| 6 |
Compton effect proves. |
- A. Wave nature of radiation
- B. Wave nature of particle
- C. Dual nature of particle
- D. Particle nature of radiations
|
| 7 |
The photoelectric effect predicts that light is made of |
- A. Photons
- B. Neutrons
- C. Protons
- D. None of these
|
| 8 |
The Compton effect is associated with |
- A. X-rays
- B. y-rays
- C. Positive rays
- D. ß-rays
|
| 9 |
If an object moves with speed of light, its mass will be. |
- A. Zero
- B. Maximum
- C. Minimum
- D. infinity
|
| 10 |
Max planck received noble prize in: |
- A. 1927
- B. 1932
- C. 1918
- D. 1914
|