Why does saturation current depend on intensity?
The saturation current depends on the intensity of the light,for a given frequency. More photons correspond to more electrons. When the increase you increase the frequency you increase stopping potential but the saturation current remains the same for a given intensity.
Why is there a saturation current?
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 is saturation current different?
Answer. In the case of photoelectric effect,light is assumed to be consisted of packets of energy. Therefore,saturation current will depend only upon the intensity of light. However,increasing the frequency will slightly increase the probability of the electron to reach the other side.
What is meant by saturation current?
: the limiting current through an ionized gas or an electron tube such that further increase of voltage produces no further increase in current.
What is saturation photocurrent?
Photocurrent is the electric current through a photosensitive device, such as a photodiode, as the result of exposure to radiant power. The photocurrent may occur as a result of the photoelectric, photoemissive, or photovoltaic effect. The highest (maximum) value of the photo-current is called saturation current.
What is saturation current in transistor?
In order for the Base current to flow, the Base input terminal must be made more positive than the Emitter by increasing it above the 0.7 volts needed for a silicon device. When maximum Collector current flows the transistor is said to be Saturated.
Why does the current saturate at high plate voltage?
When that maximum number is being emitted, the tube is said to be at SATURATION or PLATE SATURATION. Saturation is reached in a triode when the voltages on the grid and plate combine to draw all the electrons from the space charge. Any grid voltage higher than +12 volts cannot cause further changes in the output.
Why does current saturate in photoelectric effect?
current may increase as now the electrons in the wire will be under greater potential difference thereby reducing the time in which the electrons complete one round to reach the same point again and hence increasing current. (V=IR)
Why is current saturated in photoelectric effect?
The number of electrons emitted per second is fixed. SO, SATURATION CURRENT IS THAT CURRENT WHEN THE RATE OF FLOW OF CHARGE IN THE CIRCUIT BECOMES EQUAL TO THE RATE OF EMISSION OF ELECTRONS .
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.