A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ?
Correct answer: B. Excess of
- A. Lack of free
- B. Excess of
- C. Decrease in
- D. None of these
Explanation
Heating breaks covalent bonds in the semiconductor lattice, creating additional electron-hole pairs and therefore an excess of free charge carriers. This sharply increases conductivity and can damage the device.
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