Photoelectric current from a given photocell will depend upon

Options

A. number of photons striking per second
B. frequency of incident photon
C. material of the target
D. None of these

Answer

To solve the question regarding the dependence of photoelectric current from a given photocell, we can analyze the provided options step by step.

### Step 1: Understanding Photoelectric Current
Photoelectric current is generated when photons strike a material and eject electrons from it. The current is a measure of the flow of electric charge, which in this case is due to the movement of photoelectrons.

### Step 2: Analyzing the Options
1. **Number of photons striking per second**: The more photons that strike the photocell, the more electrons can be ejected. Each photon can potentially free one electron, leading to a higher current.

2. **Frequency of incident photon**: The frequency of the incident photons affects the kinetic energy of the ejected electrons but does not directly affect the number of electrons emitted. Therefore, while frequency is important for the energy of the electrons, it does not directly influence the current.

3. **Material of the target**: The material of the photocell affects the work function (the minimum energy needed to eject an electron) and can influence the efficiency of the photoelectric effect. However, for a given photocell, if we are considering the current generated, we focus on the number of photons.

4. **None of these**: This option suggests that none of the previous factors influence the photoelectric current, which is incorrect based on our analysis.

### Step 3: Conclusion
From the analysis, we conclude that the photoelectric current is primarily dependent on the **number of photons striking per second**. Therefore, the correct answer is:

**Correct Option: A - Number of photons striking per second.**