Why saturation current is independent of anode potential?
Photoelectric current is independent of frequency as the frequency of incident radiation only influences the kinetic energy of emitted photons. Photoelectric current however, depends upon the anode potential. Hence, saturation current is not dependent on frequency of incident ray.
Why does current stop increasing for positive voltage?
When the voltage is increased up to a certain level, every electron that gets released is able to reach the other electrode, but as the number of electrons getting released is constant, current too becomes constant (saturation current) and no further increase in voltage will cause increase in current.
Why does the photoelectric effect have saturation current?
If the frequency and the intensity of the incident radiation are fixed, the photoelectric current I increases with an increase in the positive voltage, as more and more electrons are directed onto the electrode. When no additional photoelectrons can be collected, the photoelectric current attains a saturation value.
Does the time taken to reach the stopping voltage increase or decrease as you increase the intensity?
As the wavelength decreases the stopping voltage increases, hence the electron energy increases. It is at that point that the stopping voltage becomes constant. This suggests that it indeeds takes time to reach the stopping voltage, but the final value does not increase with time.
What is the relation between the stopping potential and KMAX?
The maximum kinetic energy of the electrons equal the stopping voltage, when measured in electron volt.
Why does saturation current increase with intensity?
The saturation current depends on the intensity of the light,for a given frequency. More photons correspond to more electrons. One photon knock out one electron and if you increase the number of photons (or increase the intensity) you increase the current.
What is stopping potential and saturation current?
Stopping potential is independent of intensity of incident light. Stopping potential depend upon frequency of incident light. Saturating current is independent of frequency of light. Saturation current varies directly as the intensity of incident light.
Does saturation photocurrent depend on frequency?
The saturation current depends on the intensity of light, not on frequency. Hence no matter how much is the frequency for the same intensity of light, the saturation photocurrent will be same.
How does saturation current vary with anode potential for incident radiation of different frequencies but same intensity?
(i) Saturation current is same for incident radiations of different frequencies but of same intensity. It does not change with increase in anode potential.
Can current be increased after the saturation value of photoelectrons?
Of photoelectrons reaching will now be 100 only, and will not increase beacuse of increase in pot. Diff thus current after reaching its saturation value cannot be further increased. Regarding the second point, The current flowing depends on the intensity of light.
Why does the photoelectric current decrease with increasing frequency?
The reason why the photoelectric current typically reduces as frequency increases is because the intensity of the emitted beam is assumed to remain constant. Hence ]
What is a photoelectric current?
Current flown in the above circuit due to photoelectric effect is called a photoelectric current. So know you know about the photoelectric effect, photoelectric current and photoelectric effect experiment. So know it’s time to find out what will be the effect of potential difference on photoelectric current in the above experiment.
What happens to current when positive potential is increased?
With the number of increase in positive potential at plate A, there was an increase in photoelectric current as well. So after some time, this increase in photoelectric current is constant and after that, there is no increase in current even if we increase positive potential.