Maximum photocurrent ejected by electrons in photoelectric effect

[Mola]

Does anyone know how to determine the maximum photocurrent that could be produced by ejected electrons in a photoelectric effect experiment_(as unpolarized beam of light incidents on a metal surface)?
I don't know of any formula that calculates the photocurrent and I could not derive any. I was given Power as 28.0mW; frequency of the beam is 7.4* 10^14Hz; and stopping potential Vs as 1.45V.
- I calculated the wavelength of the beam of light as 405nm.(c/f);
- Energy in the photon as 3.06eV. (hf)
-Max speed of the electrons ejected as 7.1*10^5m/s. [sqrt(2K.E_max/mass)]
-Work function as 1.61eV. (E_photon - KE_max)

But I am not able to figure out a formula for determining the photocurrent.
Thanks.

 

[Mola]

I have found the magic formula from someone. It's power divided by the Energy of the photon, and then multiplying that answer by e(charge of an electron). I ended up getting 9.1mA.

 

[nlightner]

I can provide some insight into your question. The maximum photocurrent produced by electrons in a photoelectric effect experiment is dependent on several factors, including the intensity of the incident light, the frequency of the light, and the properties of the metal surface. The formula for calculating the photocurrent is given by:

I = (q*A*f*NE)/h

Where I is the photocurrent, q is the charge of an electron, A is the area of the metal surface, f is the frequency of the incident light, NE is the number of electrons ejected per unit time, and h is Planck's constant.

In your case, you have the power of the incident light, frequency, and stopping potential, but you also need to know the area of the metal surface and the number of electrons ejected per unit time. These values can be determined experimentally by measuring the photocurrent at different intensities of the incident light.

Furthermore, the work function of the metal surface also plays a crucial role in determining the maximum photocurrent. This is because the work function represents the minimum amount of energy required for an electron to be ejected from the metal surface. If the energy of the incident photon is less than the work function, no electrons will be ejected, and therefore no photocurrent will be produced.

In summary, to determine the maximum photocurrent produced by ejected electrons in a photoelectric effect experiment, you need to consider the intensity and frequency of the incident light, the properties of the metal surface, and the experimental setup. It is not possible to provide a single formula that can accurately predict the photocurrent without knowing all these factors.