Physics semiconductor
Physics of Semiconductors Quiz
Test your knowledge on semiconductors and their physical principles through this engaging quiz! With a total of 17 questions, you will dive into topics such as p-n junctions, current conduction, and energy band gaps.
Whether you’re a student or a physics enthusiast, this quiz offers:
- Multiple choice questions to assess your understanding
- Information on key semiconductor concepts
- A fun way to challenge yourself and learn more!
Q1. In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be
(a) 25 Hz
(b) 50 Hz
70.7 Hz
100 Hz
Q2. In p-n junction, the barrier potential offers resistance to
(a) only free electrons in n- region
(b) only holes in p-region
(c) free electrons in n-region and holes in p-region
(d) free electrons in p-region and holes in n-region
Q3. Carbon, silicon and germanium have four valence electrons each. These are characterized by valence and conduction bands separated by energy band gap respectively equal to (Eg)c,(Eg)Si and (Eg)Ge, Which of the following statements is true?
(a) (Eg)Si < (Eg)Ge < (Eg)c
(b) (Eg)c< (Eg)Ge< (Eg)Si
(c) (Eg)c> (Eg)Si> (Eg)Ge
(d) (Eg)c = (Eg)Si = (Eg)Ge
Q4. A p-n junction is fabricated from a semiconductor with band gap of 3.0 eV. The wavelength of the radiation which it can detect is
600nm
400nm
Both of the above
None of the above
Q. The forbidden energy band gap in conductors, semiconductors and insulators are EG1, EG2 and EG3 respectively. The correct relation is:
(a) EG3 > EG2> EG1
(b) EG3 < EG2> EG1
(c) EG3 > EG2> EG1
(d) EG3 < EG2< EG1
6. At absolute zero, Si acts as a
Metal
Semiconductor
Insulator
None of these
7. In an n-type silicon, which of the following statements is true.
(a) Electrons are majority carriers and trivalent atoms are the dopants’
(b) Electrons are minority carriers and pentava- lent atoms are the dopants.
(c) Holes are minority carriers and pentavalent atoms are the dopants.
(d) Holes are majority carriers and trivalent atoms are the dopants.
8 If a small amount of antimony is added to germanium crystal
(a) its resistance is increased
(b) it becomes a p-type semiconductor
(c) there will be more free electrons than holes in the semiconductor,
(d) none of these.
9. Region without free electrons and holes in a p-n junction is
(a) n-region
(b) p-region
(c) depletion region
(d) none of these
10. Potential barrier developed in a junction diode opposes the flow of
(a) majority carriers only
(b) electrons in p region
(c) holes in p region
(d) minority carriers only
11. If in a n-type semiconductor when all donor states are filled, then the net charge density in the donor states becomes
A ) >1
C ) = 1
B ) zero
D) <1
12 which of the following is a semiconductor
A ) diamond
B ) carbon
C ) arsenic
D ) gallium arsenide
13 A semiconductor is formed by ..........bonds
A ) covalent
B ) electrovalent
C ) ionic
D ) coordinate
14 In a semiconductor current conduction is due to .........
A ) only holes
B ) only electrons
C ) holes and electrons
D ) none of the above
15 To obtain n type semiconductor the impurity added to a pure semiconductor is
A ) trivalent
B ) tetravalent
C ) pentavalent
D ) none of these
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