A junction diode , in which one of the p or n - sections is made very thin, can be used to convert light energy into electrical energy, then the diode is called

Options

A. Light emitting diode
B. Zener diode
C. Solar cell
D. Photo diode

Answer

To solve the question, we need to identify the type of junction diode that converts light energy into electrical energy when one of its sections (either P or N) is made very thin. Here’s how we can approach the solution step by step:

### Step 1: Understand the Function of Junction Diodes
Junction diodes are semiconductor devices that allow current to flow in one direction. They can be used in various applications, including light emission and energy conversion.

**Hint:** Remember that different types of diodes have specific functions based on their structure and materials.

### Step 2: Identify the Types of Diodes Mentioned
The question provides four options:
1. Light Emitting Diode (LED)
2. Zener Diode
3. Solar Cell
4. Photodiode

**Hint:** Consider the primary function of each type of diode listed.

### Step 3: Analyze Each Option
- **Light Emitting Diode (LED):** This diode emits light when current flows through it, but it does not convert light energy into electrical energy.
- **Zener Diode:** This diode is used for voltage regulation and does not convert light energy.
- **Solar Cell:** This device is specifically designed to convert light energy (usually from the sun) into electrical energy.
- **Photodiode:** This diode can detect light and convert it into electrical current, but it is not primarily designed for energy conversion like a solar cell.

**Hint:** Focus on the specific function of converting light energy into electrical energy.

### Step 4: Determine the Correct Answer
From the analysis, the solar cell is the device that is specifically designed to convert light energy into electrical energy. Therefore, the correct answer to the question is option 3: Solar Cell.

**Hint:** Recall that solar cells are widely used in solar panels to harness solar energy.

### Final Answer
The diode that converts light energy into electrical energy, where one of the sections is made very thin, is called a **Solar Cell**.