When N-type of semiconductor is heated :
Correct answer: D. Number of electrons and holes increases equally
- A. Number of electrons increases while that of holes decreases.
- B. Number of holes increases while that of electrons decreases.
- C. Number of electrons and holes remains same
- D. Number of electrons and holes increases equally
Explanation
When an N-type semiconductor is heated, some electrons gain thermal energy, allowing them to move freely. This increase in thermal energy creates additional charge carriers in the form of both electrons and holes, and they increase in roughly equal numbers. Electrons become mobile carriers, and some of them can recombine with holes in the crystal lattice, generating new electron-hole pairs. This results in a balance between the number of electrons and holes, leading to both increasing equally. So, option (d) is indeed the correct answer.
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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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