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Semiconductor Materials – 3 – 2

106. In which band(s) do the movements of electrons and holes take place ?

(a) Valence band
(b) Conduction band
(c) Conduction and valence bands respectively
(d) Neither valence nor conduction band

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

107. The ratio of majority and minority carriers of an intrinsic semiconductor is :

(a) Zero
(b) Infinity
(c) Unity
(d) Very large

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

108. The ratio of majority and minority carriers of an extrinsic semiconductor is :

(a) Zero
(b) Infinity
(c) Unity
(d) Very large

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

109. The forbidden in germanium at 0°K is :

(a) 0.785 eV
(b) 1.21 eV
(c) 1.00 eV
(d) 0.01 eV

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

110. The mean free path for electron drift increases with :

(a) Purity concentration
(b) Strain hardening
(c) Elastic modulus
(d) Length

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

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