1. | \(N\) and \(2T\) | 2. | \(2N\) and \(T\) |
3. | \(2N\) and \(2T\) | 4. | \(N\) and \(T\) |
The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three difference radiations. Which one of the following is a correct statement?
1. Curves a and b represent incident radiations of different frequencies and different intensities
2. Curves a and b represent incident radiations of same frequency but of different intensities
3. Curves b and c represent incident radiations of different frequencies and different intensities
4. Curves b and c represent incident radiations of same frequency having same intensity
1. | \(2.7 \times 10^{-18} ~\text{ms}^{-1}\) |
2. | \(9 \times 10^{-2} ~\text{ms}^{-1}\) |
3. | \(3 \times 10^{-31}~\text{ms}^{-1}\) |
4. | \(2.7 \times 10^{-21} ~\text{ms}^{-1}\) |
An electron with an initial velocity v= is in an electric field E It's de Broglie wavelength at the time is given by:
1.
2.
3.
4.
Cathode rays are similar to visible light rays in that
(1) They both can be deflected by electric and magnetic fields
(2) They both have a definite magnitude of wavelength
(3) They both can ionize a gas through which they pass
(4) They both can expose a photographic plate
Electron volt is a unit of
(1) Potential
(2) Charge
(3) Power
(4) Energy
In an electron gun, the electrons are accelerated by the potential V. If e is the charge and m is the mass of an electron, then the maximum velocity of these electrons will be
(1)
(2)
(3)
(4)
The idea of matter waves was given by
(1) Davisson and Germer
(2) de-Broglie
(3) Einstein
(4) Planck
Waves are associated with matter only:
1. | When it is stationary. |
2. | When it is in motion with the velocity of light only. |
3. | When it is in motion with any velocity. |
4. | None of the above. |
The de-Broglie wavelength associated with the particle of mass m moving with velocity v is
(1) h/mv
(2) mv/h
(3) mh/v
(4) m/hv