Number of waves produced by an electron in one complete revolution in nth orbit is:
1.
2.
3.
4.
The energy of an electron moving in nth Bohr's orbit of an element is given by eV/atom (Z=atomic number). The graph of (keeping "n" constant) will be:
1.
2.
3.
4.
The spectrum produced from an element is:
1. atomic spectrum
2. line spectrum
3. absorption spectrum
4. any one of the above
Which of the following expressions represents the spectrum of Balmer series (If n is the principal quantum number of higher energy level) in Hydrogen atom?
1.
2.
3.
4.
The H-spectrum show:
1. Heisenberg's uncertainty principle
2. Diffraction
3. Polarization
4. Presence of quantized energy level
In photoelectric effect, the kinetic energy of photoelectrons increases linearly with the:
1. Wavelength of incident light.
2. Frequency of incident light.
3. Velocity of incident light.
4. Atomic mass of an element.
Slope of vs v curve is (where =stopping potential, v=subjected frequency)
1.
2.
3.
4.
According to Einstein's photoelectric equation, the graph between kinetic energy of
photoelectrons ejected and the frequency of the incident radiation is:
1.
2.
3.
4.
The photoelectric emission from a surface starts only when the light incident upon the surface has a certain minimum:
1. | Intensity | 2. | Wavelength |
3. | Frequency | 4. | Velocity |
If and be the threshold wavelength and the wavelength of incident light, the velocity of photo-electrons ejected from the metal surface is:
1.
2.
3.
4.