Question

Which one of the following represents forward bias diode?

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is A

To determine which option represents a forward bias diode, we need to understand the concept of diode biasing.

• Forward Bias: In forward bias, the positive terminal of the battery is connected to the anode (p-side) of the diode and the negative terminal to the cathode (n-side). This reduces the potential barrier and allows current to flow through the diode.
• Reverse Bias: In reverse bias, the positive terminal of the battery is connected to the cathode (n-side) and the negative terminal to the anode (p-side). This increases the potential barrier and prevents current flow through the diode.

Let's examine the given options visually:

The image above depicts a diode in forward bias configuration:

• The anode is connected to the positive terminal of the battery.
• The cathode is connected to the negative terminal of the battery.

This setup allows the current to flow through the diode, confirming it as a forward bias configuration.

Other options represent reverse bias configurations and hence do not allow the current to flow:

• The anode connects to the negative terminal and the cathode connects to a positive terminal (Reverse Bias).
• In all other configurations, it creates a barrier preventing current flow.

Therefore, the correct answer is the first image configuration, which correctly illustrates a forward bias diode.