62. Excess majority carriers are the carriers which are :
(a) Equal to the number of hole concentration (b) In excess of the equilibrium number (c) Minority carriers in P-type semiconductor (d) Thermally generated
Answer
Answer : (b)
Explanation
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(a) Collection of electrons, positive and negative ions only (b) Collection of electrons and positive ions only (c) Collection of neutral atoms and molecules only (d) Collection of electrons, positive and negative ions, neutral atoms and molecules
Answer
Answer : (d)
Explanation
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65. In germanium, when atoms are held together by the sharing of valence electrons :
(a) Each shared atom leaves a hole (b) Valence electrons are free to move away from the nucleus (c) They form reversible covalent bonds (d) They form irreversible covalent bonds
Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Atoms and Electrons » Exercise - 282. An electron in the conduction band - (a) Has a lower energy than an electron in the valence band (b) Has a higher energy than an electron in the valence band (c) Is located near the surface of the solid (d) Is bound to its parent atom
Atoms and Electrons » Exercise - 287. An electron is termed free electron, if found in - (a) Conduction band (b) Forbidden gap (c) Valence band (d) Either in valence band or conduction band
Atoms and Electrons » Exercise - 280. The energy gap between valence and conduction bands in insulators is about ........ (a) 15 eV (b) 1.5 eV (c) zero (d) 0.5 eV
Atoms and Electrons » Exercise - 277. In insulators, the energy gap between valence and conduction bands is ........ (a) very large (b) zero (c) very small (d) none of the above
Atoms and Electrons » Exercise - 272. The energy gap between valence and conduction bands in insulators is about ........ (a) 15 eV (b) 1.5 eV (c) zero (d) 0.5 eV