Semiconductor Materials – 1 – 2

6. In a semiconductor, the total current is equal to :

(a) sum of electron and hole currents flow in same direction
(b) sum of electron and hole currents flow in opposite directions
(c) electron current only
(d) hole current only

ANSWER
Answer : (b)

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

7. The minority holes are about ……… that of electron.

(a) half
(b) same
(c) twice
(d) thrice

ANSWER
Answer : (a)

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

8. Germanium and silicon are :

(a) trivalent
(b) tetravalent
(c) pentavalent
(d) covalent

ANSWER
Answer : (b)

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

9. The volume charge density of mobile carriers is expressed in :

(a) coulombs / cubic meters
(b) coulombs / meters
(c) coulombs / seconds
(d) coulombs / volts

ANSWER
Answer : (a)

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

10. In a Silicon crystal, the number of covalent bonds a single atom can form is :

(a) 2
(b) 4
(c) 6
(d) 8

ANSWER
Answer : (b)

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

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