Which of the following statements is correct regarding the photoelectric experiment ?

Options

A. The photocurrent increases with intensity of light.
B. Stopping potential increases with increase in intensity of incident light.
C. The photocurrent increases with increase in frequency.
D. All of these

Explanation

To determine which statement is correct regarding the photoelectric experiment, we will analyze each of the provided statements step by step.

### Step 1: Analyze the first statement
**Statement 1:** The photocurrent increases with intensity of light.

- **Explanation:** In the photoelectric effect, the photocurrent is directly proportional to the intensity of the incident light. This means that as the intensity of light increases, the number of photoelectrons emitted also increases, leading to a higher photocurrent. However, it is important to note that the photocurrent is independent of the frequency of the light.

### Step 2: Analyze the second statement
**Statement 2:** The stopping potential increases with an increase in the intensity of incident light.

- **Explanation:** The stopping potential is the minimum potential needed to stop the photoelectrons emitted from the surface. It is directly proportional to the frequency of the incident light, not the intensity. Therefore, this statement is incorrect because the stopping potential does not depend on the intensity of light.

### Step 3: Analyze the third statement
**Statement 3:** The photocurrent increases with an increase in frequency.

- **Explanation:** The photocurrent is independent of the frequency of the incident light. While higher frequency light can lead to the emission of photoelectrons (if above the threshold frequency), the photocurrent itself does not increase with frequency. Thus, this statement is also incorrect.

### Step 4: Analyze the fourth statement
**Statement 4:** (Assuming a fourth statement exists, but not provided in the transcript.)

- **Explanation:** Without the fourth statement, we cannot analyze it. However, based on the first three statements, we can conclude that only the first statement is correct.

### Conclusion
The correct statement regarding the photoelectric experiment is:
- **The photocurrent increases with intensity of light.**