A completely filled band is called:
Correct answer: A. Valence band
- A. Valence band
- B. Conduction band
- C. Forbidden band
- D. None of these
Explanation
In certain specific materials like insulators and semiconductors, the valence band is typically not fully filled at normal ambient conditions. It contains electrons occupying various energy states, but there are still available energy levels within the valence band for electrons to move around and participate in bonding. However, in some cases, particularly with certain elements or compounds, the valence band can be nearly full or completely filled. This configuration usually contributes to their insulating properties because there's limited availability of energy states for electrons to move and conduct electricity.
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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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