| 1 |
In Compton effect the photon behaves as a. |
- A. Wave
- B. Particle
- C. Nucleon
- D. Both a and b
|
| 2 |
A perfect absorber must also be perfect |
- A. Cavity
- B. Sources of radiation
- C. Radiator
- D. None of these
|
| 3 |
The energy of the photon of wavelength 500 nm is. |
- A. 3.10 eV
- B. 2.49 eV
- C. 1.77 eV
- D. 1.52 eV
|
| 4 |
The unit for Plank's constant is: |
- A. Js<sup>-1</sup>
- B. Jm
- C. Js
- D. Jm<sup>2</sup>
|
| 5 |
When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be. |
- A. Photoelectric effect
- B. Compton effect
- C. Pair production
- D. Annihilation of matter
|
| 6 |
Eintein's Photoelectric equation is E<sub>k</sub>= hf -∅ in this equation E<sub>1</sub>, refers to: |
- A. K.E of al the emited electrons
- B. Mean K.E of emited electrons
- C. Maximum K.E of emited electrons
- D. Minimum K.E of emited electrons
|
| 7 |
Number of electros emitted in photo electric effect depend upon. |
- A. Intensity of incident light
- B. Frequency of incident light
- C. Energy of incident light
- D. Wavelength of incident of light
|
| 8 |
The minimum frequency needed to emit an electron form metal surface is called: |
- A. Work function
- B. Threshold frequency
- C. Quanta frequency
- D. All of above
|
| 9 |
When platinum is heated is become dull red at: |
- A. 900°C
- B. 500°C
- C. 800°C
- D. 1100°C
|
| 10 |
If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be |
- A. 50 V
- B. 2 V
- C. 5 V
- D. 15 V
|
