The maximum value of photoelectric current is called

Options

A. base current
B. saturation current
C. collector current
D. emitter current

Answer

To solve the question about the maximum value of photoelectric current, we can break down the explanation step by step:

### Step-by-Step Solution:

1. **Understanding Photoelectric Current**:
- Photoelectric current is generated when light (photons) hits a material and causes the emission of electrons.

**Hint**: Remember that the photoelectric effect requires light to have a frequency above a certain threshold.

2. **Threshold Frequency**:
- For photoelectric emission to occur, the frequency of the incident light must be greater than the threshold frequency of the material. This is the minimum frequency needed to eject electrons from the surface.

**Hint**: Identify the relationship between frequency and the emission of electrons.

3. **Constant Plate Potential**:
- In a photoelectric experiment, a constant potential is applied to the plates. This helps in collecting the emitted electrons and measuring the current.

**Hint**: Consider how voltage affects the collection of emitted electrons.

4. **Maximum Photoelectric Current**:
- As the intensity of the incident light increases (while keeping the frequency above the threshold), more electrons are emitted, which increases the current. The maximum value of this current, at a given frequency and potential, is reached when all emitted electrons are collected.

**Hint**: Think about the conditions under which all emitted electrons contribute to the current.

5. **Saturation Current**:
- The maximum value of the photoelectric current is referred to as the saturation current. This occurs when increasing the intensity of light does not increase the current any further because all emitted electrons are being collected.

**Hint**: Recall the term used to describe the maximum current in a photoelectric effect scenario.

### Final Answer:
The maximum value of photoelectric current is called **saturation current**.