Pn Junction Forward Bias
Easyphysics
Forward biasing a PN junction means?
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Solution
Incorrect! Answer:
P side to positive, N side to negative
- Definition of Forward Bias: An external voltage arrangement that reduces the potential barrier of the PN junction.
- Connection: The P-type region is connected to the positive terminal of the battery, and the N-type region is connected to the negative terminal.
- Physical Effect: The positive terminal repels holes in the P-side toward the junction, and the negative terminal repels electrons in the N-side toward the junction.
- Barrier Change: This results in a thinning of the depletion region and a reduction in the height of the potential barrier, allowing significant current flow.
- Reverse Bias Note: The opposite connection (P to negative, N to positive) is known as reverse bias.
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About This Question
- Subject
- physics
- Chapter
- semiconductor devices
- Topic
- pn junction forward bias
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
P side to positive, N side to negative
- Definition of Forward Bias: An external voltage arrangement that reduces the potential barrier of the PN junction.
- Connection: The P-type region is connected to the positive terminal of the battery, and the N-type region is connected to the negative terminal.
- Physical Effect: The positive terminal repels holes in the P-side toward the junction, and the negative terminal repels electrons in the N-side toward the junction.
- Barrier Change: This results in a thinning of the depletion region and a reduction in the height of the potential barrier, allowing significant current flow.
- Reverse Bias Note: The opposite connection (P to negative, N to positive) is known as reverse bias.
This easy difficulty physics question is from the chapter semiconductor devices, covering the topic of pn junction forward bias. It appeared in the 2025 exam.
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