| 1 |
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
|
| 2 |
Study of hydrogen visible spectrum in |
- A. 1886
- B. 1887
- C. 1895
- D. 1885
|
| 3 |
Kx -Xrays are produced due to transition of electron from. |
- A. K to L shell
- B. L to K shell
- C. M to K shell
- D. M to L shell
|
| 4 |
Production of x rays is reverse process of |
- A. Photo electric effect
- B. Compton effect
- C. An nihilation
- D. Pair production
|
| 5 |
Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their. |
- A. Energy
- B. Mass
- C. Wave length
- D. Momentum
|
| 6 |
Which is not characteristic of Laser. |
- A. Monochromatic
- B. Coherent
- C. Intense
- D. Multi direction
|
| 7 |
Electron volt is unit of: |
- A. Chemical energy
- B. Potential energy
- C. Nuclear energy
- D. heat energy
|
| 8 |
The energy of 4th Orbit in hydrogen atom is. |
- A. -2.51 eV
- B. -3.50 eV
- C. -13.60 eV
- D. -0.85 eV
|
| 9 |
When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as. |
- A. Photoelectric effect
- B. Piezo electric effect
- C. Thermionic emission
- D. Secondary emission
|
| 10 |
Laser is a beam of light which is |
- A. Monochromatic
- B. Coherent
- C. Unidirectional
- D. All of these
|
