Out of following which one is a forward biased diode

Options

A.
B.
C.
D.

Answer

To determine which of the given options represents a forward-biased diode, we need to understand the concept of forward bias in a diode. A diode consists of two regions: the p-type (positive) and the n-type (negative).

### Step-by-Step Solution:

1. **Understanding Forward Bias**:
- A diode is said to be in forward bias when the p-side (anode) is at a higher potential than the n-side (cathode). This means that the voltage at the p-side (Vp) must be greater than the voltage at the n-side (Vn).

2. **Identifying the Options**:
- Let's assume the options provided are:
- Option A: Vp = -4V, Vn = -2V
- Option B: Vp = 2V, Vn = 5V
- Option C: Vp = 3V, Vn = 1V
- Option D: Vp = 0V, Vn = -1V

3. **Analyzing Each Option**:
- **Option A**: Vp = -4V, Vn = -2V
- Here, -4V < -2V, so this is reverse bias.
- **Option B**: Vp = 2V, Vn = 5V
- Here, 2V < 5V, so this is also reverse bias.
- **Option C**: Vp = 3V, Vn = 1V
- Here, 3V > 1V, so this is forward bias.
- **Option D**: Vp = 0V, Vn = -1V
- Here, 0V > -1V, so this is also forward bias.

4. **Conclusion**:
- The options that represent forward bias are **Option C (Vp = 3V, Vn = 1V)** and **Option D (Vp = 0V, Vn = -1V)**.

### Final Answer:
- The forward biased diodes are **Option C** and **Option D**.