| 1 |
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
|
| 2 |
We can find from de Broglie formula |
- A. Wavelength
- B. Amplitude
- C. Speed of wave
- D. Frequency of wave
|
| 3 |
The rest mass x ray photon is |
- A. Infinite
- B. Zero
- C. 1.67 X<sup>-17</sup> kg
- D. All of the above
|
| 4 |
The radius of 10th orbit in hydrogen atom is. |
- A. 0.053 nm
- B. 0.53 nm
- C. 5.3 nm
- D. 53 nm
|
| 5 |
The value of Rydberg constant is |
- A. 1.0974 x 10<sup>7</sup> m<sup>-1</sup>
- B. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup>
- C. 1.0974 x 10<sup>6</sup> m<sup>-1</sup>
- D. 1.0974 x 10<sup>-6</sup> m<sup>-1</sup>
|
| 6 |
Which series lies in the ultraviolet region. |
- A. Balmer series
- B. Bracket series
- C. Ptund series
- D. Lyman series
|
| 7 |
Life time of metastable states is |
- A. 10<sup>-6</sup> sec or more
- B. 10<sup>-3</sup> sec or more
- C. 10<sup>-5</sup> sec or more
- D. None of these
|
| 8 |
Black Body radiation spectrum is an example of: |
- A. Atomic spectra
- B. Line spectra
- C. Continuous spectra
- D. None of above
|
| 9 |
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
|
| 10 |
In an electronic transition atom cannot emit.<div></div> |
- A. Infrared radiations
- B. Visible radiations
- C. Ultraviolet radiations
- D. Gama radiations
|
