In forward biased condition, the p-n junction diode behaves as

Options

A. High resistance connection
B. Act as a closed switch
C. A low resistance connection
D. A capacitor

Answer

To solve the question regarding the behavior of a p-n junction diode in forward-biased condition, we can break down the explanation into clear steps.

### Step-by-Step Solution:

1. **Understanding Forward Bias**:
- In a p-n junction diode, forward bias occurs when the p-type material (anode) is connected to a higher voltage than the n-type material (cathode). This reduces the potential barrier at the junction.

2. **Potential Barrier Reduction**:
- When the diode is forward biased, the applied voltage reduces the potential barrier that normally prevents current flow. This means that the energy barrier that charge carriers (holes and electrons) must overcome to cross the junction is lowered.

3. **Depletion Region**:
- The depletion region is the area around the p-n junction where mobile charge carriers are depleted. In forward bias, the width of this depletion layer decreases because the applied voltage pushes the charge carriers towards the junction, allowing more carriers to recombine.

4. **Current Flow**:
- With the reduced potential barrier and narrower depletion region, charge carriers can easily cross the junction. This allows a significant amount of current to flow through the diode.

5. **Diode Behavior**:
- Due to the above conditions, the diode behaves like a closed switch, allowing current to flow freely from the anode to the cathode. This is the key characteristic of a forward-biased diode.

### Final Answer:
In forward-biased condition, the p-n junction diode behaves as a closed switch, allowing current to flow through it easily.

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