Semiconductors MCQs | Semiconductors Short Questions and Answers

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
41 When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on……
A Junction capacitance
B Minority carriers
C Majority carriers
D None of the above

Answer: Minority carriers
42 In an intrinsic semiconductor, the number of free electrons ………
A Equals the number of holes
B Is greater than the number of holes
C Is less than the number of holes
D None of the above

Answer: Equals the number of holes
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
43 At absolute temperature, an intrinsic semiconductor has ……….
A A few free electrons
B Many holes
C Many free electrons
D No holes or free electrons

Answer: No holes or free electrons
44 At room temperature, an intrinsic silicon crystal acts approximately as ……
A A battery
B A conductor
C An insulator
D A piece of copper wire

Answer: An insulator
45 With forward bias to a pn junction , the width of depletion layer ………
A Decreases
B Increases
C Remains the same
D None of the above

Answer: Decreases
46 At room temperature, an intrinsic semiconductor has ……….
A Many holes only
B A few free electrons and holes
C Many free electrons only
D No holes or free electrons

Answer: A few free electrons and holes
47 A pn junction acts as a ……….
A Controlled switch
B Bidirectional switch
C Unidirectional switch
D None of the above

Answer: Unidirectional switch
48 A reverse bias pn junction has …………
A Very narrow depletion layer
B Almost no current
C Very low resistance
D Large current flow

Answer: Almost no current
49 In a semiconductor, current conduction is due to ……..
A Only holes
B Only free electrons
C Holes and free electrons
D None of the above

Answer: Holes and free electrons
50 The impurity level in an extrinsic semiconductor is about ….. of pure semiconductor.
A 10 atoms for 108 atoms
B 1 atom for 108 atoms
C 1 atom for 104 atoms
D 1 atom for 100 atoms

Answer: 1 atom for 108 atoms
51 Addition of trivalent impurity to a semiconductor creates many ……..
A Holes
B Free electrons
C Valence electrons
D Bound electrons

Answer: Holes
52 An n-type semiconductor is ………
A Positively charged
B Negatively charged
C Electrically neutral
D None of the above

Answer: Electrically neutral
53 When a pentavalent impurity is added to a pure semiconductor, it becomes ………
A An insulator
B An intrinsic semiconductor
C p-type semiconductor
D n-type semiconductor

Answer: n-type semiconductor
54 The strength of a semiconductor crystal comes from ……..
A Forces between nuclei
B Forces between protons
C Electron-pair bonds
D None of the above

Answer: Electron-pair bonds
55 The resistivity of a pure silicon is about ……………
A 100 O cm
B 6000 O cm
C 3 x 105 O m
D 6 x 10-8 O cm

Answer: 6000 O cm
56 How is charge carriers produced in intrinsic semiconductors?
A By pure atoms
B By electrons
C By impure atoms
D By holes

Answer: By impure atoms
57 Which of the following is known as indirect band gap semiconductors?
A Germanium
B Nickel
C Platinum
D Carbon

Answer: Germanium
58 How is the resistance of semiconductor classified?
A High resistance
B Positive temperature co-efficient
C Negative temperature co-efficient
D Low resistance

Answer: Negative temperature co-efficient
59 Under normal conditions a diode conducts current when it is ……………
A reverse biased
B forward biased
C avalanched
D saturated

Answer: forward biased
60 When a pure semiconductor is heated, its resistance …………..
A Goes up
B Goes down
C Remains the same
D Can’t say

Answer: Goes down

Random GK Questions

Q. Which of the following imparts deep blue colour to glass ?
Q. Which of the following statements is true?
Q. The incidence of Tax refers to
Q. Name the Olympic Gold medalist who won Athelete of the Year-2013 Award at JAAA Golden Cleats Award Ceremony.
Q. Which one of the following has the highest value of specific heat?
Q. Knowledge about the existence of which of the following animals is doubtful in the Indus Valley Civilization ?
Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series