| 1 |
A positron is an anti particle of. |
- A. Proton
- B. Electron
- C. Neutron
- D. Photon
|
| 2 |
Earth orbital speed is. |
- A. 10 km/s
- B. 20 km/s
- C. 30 km/s
- D. 40 km/s
|
| 3 |
Einstein was awarded Nobel prize in physics in |
- A. 1905
- B. 1911
- C. 1918
- D. 1921
|
| 4 |
The physical quantity related to photon, that does not change in Compton scattering is. |
- A. Energy
- B. Speed
- C. Frequency
- D. Wavelength
|
| 5 |
An electron miroscope emplys which to one of the following particles? |
- A. Electron ahve a wave nature
- B. Electrons can be focused by an electric field
- C. Electrons can be focused by a magnetic field
- D. All of the above
|
| 6 |
The wavelength associated with the protons moving at speed of 40 m/s is. |
- A. 7.20 nm
- B. 9.02
- C. 15.7 nm
- D. 17.3 nm
|
| 7 |
Pair production cannto take place in vacuum because : |
- A. Mass in not conserved
- B. Momentum is not conserved
- C. Energy is not conserved
- D. Charge is not conserved
|
| 8 |
The value of Wien's constant: |
- A. 2.9x10<sup>-3</sup>mk
- B. 2.19x10<sup>-7</sup>mk
- C. 3.18 x10<sup>6</sup> km<sup>-1</sup>
- D. 6.21 x 10<sup>-9</sup>m<sup>2</sup>wk<sup>3</sup>
|
| 9 |
The value of Stefan is constant is: |
- A. 4.57 x 10<sup>-8</sup> m<sup>2</sup>k<sup>2</sup>
- B. 5.67 x10<sup>-8</sup> wm<sup>-2</sup>k<sup>-4</sup>
- C. 6.67x 10<sup>-11</sup> wm<sup>2</sup>k<sup>4</sup>
- D. 7.45 x 10<sup>-9</sup> m<sup>2</sup> wk<sup>3</sup>
|
| 10 |
The converses of annihilation of matter is: |
- A. Photoelectric effect
- B. Relativistic effect
- C. Pair production
- D. Compton effect
|
