JAMB Exam > JAMB Videos > Physics for JAMB > P-type Semiconductors
P-type Semiconductors Video Lecture | Physics for JAMB
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FAQs on P-type Semiconductors Video Lecture - Physics for JAMB
| 1. What is a P-type semiconductor? |  |
Ans. A P-type semiconductor is a type of material that has been doped with impurities to create a deficiency of electrons, resulting in a positive charge carrier. It is characterized by having a majority of holes as charge carriers, which can move through the material when an electric field is applied.
| 2. What are the impurities used to create a P-type semiconductor? | |
Ans. The impurities used to create a P-type semiconductor are typically trivalent elements such as boron, aluminum, or gallium. These elements have one less valence electron than the atoms in the semiconductor material, creating a "hole" where an electron is missing. This hole acts as a positive charge carrier.
| 3. How does a P-type semiconductor differ from an N-type semiconductor? | |
Ans. The main difference between a P-type semiconductor and an N-type semiconductor lies in the majority charge carriers. In a P-type semiconductor, the majority charge carriers are holes, while in an N-type semiconductor, the majority charge carriers are electrons. This difference is achieved by doping the semiconductor material with different types of impurities.
| 4. What are the applications of P-type semiconductors? | |
Ans. P-type semiconductors are widely used in various electronic devices and applications. Some common applications include p-n junction diodes, bipolar junction transistors (BJTs), complementary metal-oxide-semiconductor (CMOS) circuits, and solar cells. P-type semiconductors are crucial components in the field of electronics.
| 5. How does doping affect the conductivity of a P-type semiconductor? | |
Ans. Doping introduces impurities into a semiconductor material, altering its conductivity. In the case of a P-type semiconductor, the doping process introduces trivalent impurities that create a deficiency of electrons, resulting in the formation of holes. These holes act as charge carriers and contribute to the conductivity of the P-type semiconductor. The higher the doping concentration, the higher the conductivity of the P-type semiconductor.
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Oct 24, 2024 Last updated |
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