| 1 |
The temperature of core of nuclear reactor is: |
- A. 1100°C
- B. 1200°C
- C. 1300°C
- D. 1400°C
|
| 2 |
Energy produced due to fission of uranium atom is: |
- A. 500MeV
- B. 200MeV
- C. 700MeV
- D. 750MEV
|
| 3 |
In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to: |
- A. Infinite energy
- B. Maximum energy
- C. Minimum energy
- D. Zero energy
|
| 4 |
For an atom of hydrogen atom the radius of the first orbit is given by: |
- A. H/me<sup>2</sup>
- B. me/4h<sup>2</sup>
- C. h2/4<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">π<sup>2</sup> kme<sup style="">2</sup></span>
- D. h<sup>2</sup> me<sup>2</sup>
|
| 5 |
Helium Neon Laser Beam emitted from discharge tube has a colour. |
- A. Blue
- B. Green
- C. Red
- D. Black
|
| 6 |
Radius of first Bohr's orbit is. |
- A. 0.053 nm
- B. 0.053 mm
- C. 0.053 micro meter
- D. 0.053 m
|
| 7 |
X-rays were discovered by |
- A. Curie
- B. Henry Becquerel
- C. Rontgen
- D. None of these
|
| 8 |
If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of. |
- A. 3.40 eV
- B. 10.20 eV
- C. 13.6 eV
- D. 3.8 eV
|
| 9 |
The unit of Rh is. |
- A. ms-1
- B. m
- C. m<sup>2</sup>
- D. m<sup>-1</sup>
|
| 10 |
Laser is a beam of light which is |
- A. Monochromatic
- B. Coherent
- C. Unidirectional
- D. All of these
|
