The P-type semi-conductor is obtained by adding impurity materials:
Correct answer: B. Boron, Indium or Gallium
- A. Carbon, Oxygen and Nitrogen
- B. Boron, Indium or Gallium
- C. Arsenic and Oxygen
- D. None of these
Explanation
The P-type semiconductor is obtained by adding impurity materials such as boron, aluminum, or gallium. These elements have fewer electrons in their outer shells compared to the host semiconductor material like silicon or germanium. When they're introduced as impurities, they create "holes" or vacancies in the crystal lattice, leading to a shortage of electrons and generating a P-type semiconductor.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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