Atoms and Electrons – 2 – 8

86. Atoms inside a crystal possess –

(a) Discrete energy state
(b) Equidistant energy state
(c) Energy bands
(d) Equidistant energy bands

ANSWER

EXPLANATION

87. 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

ANSWER

EXPLANATION

88. Valence and conduction bands overlap each other case of –

(a) Insulators
(b) Semiconductors
(c) Metals
(d) In all

ANSWER

EXPLANATION

89. Conduction band is practically empty in case of their resistivity –

(a) Insulators
(b) Semiconductors
(c) Metals
(d) None of these

ANSWER

EXPLANATION

90. Width for forbidden gap is maximum for :

(a) Metals
(b) Semiconductor
(c) Insulators
(d) All of them

ANSWER

EXPLANATION

1 2 3 4 5 6 7 8 9

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Your email address will not be published.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.