1 |
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>
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2 |
_____ has the largest de Broglie wavelength at same speed. |
- A. Proton
- B. Alpha particle
- C. Carbon atom
- D. Electron
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3 |
Which is not true for X rays |
- A. X rays are not defected by electric field
- B. X rays are polarized
- C. X rays consist of electromagnetic waves
- D. X rays can be diffracted by grating
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4 |
If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be |
- A. 136.0 volt
- B. 3.0 volt
- C. 13.6 volt
- D. None of these
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5 |
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
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6 |
Laser can be made by creating. |
- A. Meta stable
- B. Population inversion
- C. Excited state
- D. All of these
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7 |
Which is not characteristic of Laser. |
- A. Monochromatic
- B. Coherent
- C. Intense
- D. Multi direction
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8 |
We can find from de Broglie formula |
- A. Wavelength
- B. Amplitude
- C. Speed of wave
- D. Frequency of wave
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9 |
Charge on an atom is: |
- A. Positive
- B. Negative
- C. Neutral
- D. None of these
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10 |
Black Body radiation spectrum is an example of: |
- A. Atomic spectra
- B. Line spectra
- C. Continuous spectra
- D. None of above
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