pulse Click on Answer tab for Answers.

Semiconductor Materials – 3 – 4

116. At 300ºK, the forbidden energy gap in germanium is :

(a) 0.543 eV
(b) 0.632 eV
(c) 0.72 eV
(d) 0.89 eV

ANSWER

EXPLANATION

117. Semiconductors in pure form are poor conductors because :

(a) They have no valence electrons
(b) All valence electrons are in electron pairs
(c) They have a large number of holes
(d) They have fewer electrons than protons

ANSWER

EXPLANATION

118. When a pure semiconductor is heated :

(a) It becomes metal
(b) Its atomic structure collapses
(c) Its resistance increases
(d) Its resistance decreases

ANSWER

EXPLANATION

119. In a pure semiconductor, electric current is due to :

(a) Holes
(b) Electrons
(c) Both holes and electrons
(d) Valence electrons

ANSWER

EXPLANATION

120. The n type impurity :

(a) Can be added to Ge but not to Si
(b) Can be added to Si but not to Ge
(c) Creates excess holes
(d) Creates excess electrons

ANSWER

EXPLANATION

1 2 3 4 5 6 7 8 9 10

Be a Part of The New & Next

MCQs fb  MCQs G+

Share the Knowledge

Leave a Reply

Your email address will not be published.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

Shares
Copy Protected by Chetan's WP-Copyprotect.