Home / Semiconductor Materials – 4 – 5

Semiconductor Materials – 4 – 5

171. The drift of a hole in a semiconductor is brought by –

(a) The vacancy being filled by a free electron
(b) The vacancy being filled by an ion
(c) The vacancy being filled by a valence electron from a neighbouring atom
(d) The movement of an atom in the solid

Answer
Answer : (c)

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

172. A substance has an electron concentration of 8 x 106 per m3 and a hole concentration of 2 x 1012 per m3. The substance is –

(a) An intrinsic semiconductor
(b) A n- type semiconductor
(c) A p- type semiconductor
(d) An insulator

Answer
Answer : (b)

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

173. When the conductivity of semiconductor is only due to the breaking of the covalent bands, the semiconductor is –

(a) An intrinsic semiconductor
(b) A p- type semiconductor
(c) A n- type semiconductor
(d) an extrinsic semiconductor

Answer
Answer : (a)

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

174. In Intrinsic semi conductor the valence and conduction bands –

(a) Overlap with each other
(b) Are separated by an energy gap of about 1 eV
(c) Are separated by an energy gap of about 10 eV
(d) Are separated by an energy gap about 0.001 eV

Answer
Answer : (b)

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

175. The energy band gap of silicon is –

(a) 0.72 eV
(b) 1.1 eV
(c) 6 eV
(d) Between 0.72 eV to 1.1 eV

Answer
Answer : (b)

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

1 2 3 4 5 6 7 8

General Knowledge Books

Be a Part of the New & Next

MCQs fb  MCQs G+

Share the Knowledge

MORE INFORMATION
GATE Total InfoGATE 2019 BooksFree Notes
IES Total InfoIES 2019 BooksFree Mock tests
JAM Total InfoJAM 2019 BooksEngg Diploma
PSUs Total InfoM Tech Total InfoUGC NET Total Info

Leave a Reply

Your email address will not be published. Required fields are marked *

Copy Protected by Chetan's WP-Copyprotect.