Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence
Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence
- A
Thermionic valve
- B
Photoelectric cell
- C
Cathode ray oscilloscope
- D
Electron gun
Similar Questions
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be
When subjected to a transverse electric field, cathode rays move
When subjected to a transverse electric field, cathode rays move
From the following, what charges can be present on oil drops in Millikan's experiment
(Here e is the electronic charge)
From the following, what charges can be present on oil drops in Millikan's experiment
(Here e is the electronic charge)
Write speed of cathode rays.
Write speed of cathode rays.
In a parabola spectrograph, the velocities of four positive ions $P,Q,R$ and $S$ are $v_1$, $v_2$, $v_3$ and $v_4$ respectively
In a parabola spectrograph, the velocities of four positive ions $P,Q,R$ and $S$ are $v_1$, $v_2$, $v_3$ and $v_4$ respectively