Which type of current passes through extrinsic semiconductors diode?
Correct answer: A. Unidirectional
- A. Unidirectional
- B. Bidirectional
- C. Both a and b
- D. None of these
Explanation
Extrinsic semiconductors diodes are designed to allow current flow in only one direction. This is because of the p-n junction created within the diode. The p-type material has an excess of holes, while the n-type material has an excess of electrons. When a forward bias is applied, the holes from the p-type material move towards the n-type material, and the electrons from the n-type material move towards the p-type material. This creates a current flow. However, when a reverse bias is applied, the holes and electrons are pulled away from the junction, resulting in a very small reverse current. This unidirectional current flow is a key characteristic of diodes, making them suitable for applications such as rectifiers, which convert alternating current (AC) to direct current (DC).
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