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Questions and Answers
Which of the following describes a positive semiconductor?
Which of the following describes a positive semiconductor?
What is the most commonly used semiconductor?
What is the most commonly used semiconductor?
Which characteristic is NOT associated with negative semiconductors?
Which characteristic is NOT associated with negative semiconductors?
Which of the following is an incorrect statement about semiconductors?
Which of the following is an incorrect statement about semiconductors?
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In the context of semiconductors, which option describes 'zero' without further context?
In the context of semiconductors, which option describes 'zero' without further context?
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What primarily holds molecules together at the atomic level?
What primarily holds molecules together at the atomic level?
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Which statement about bonds in atoms is false?
Which statement about bonds in atoms is false?
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What is the nature of forces between protons?
What is the nature of forces between protons?
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Which of the following correctly describes a characteristic of electron-pair bonds?
Which of the following correctly describes a characteristic of electron-pair bonds?
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Which of the following statements about chemical bonds is most accurate?
Which of the following statements about chemical bonds is most accurate?
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Study Notes
Semiconductor Physics Model Answers
- Q1: A semiconductor is formed by covalent bonds.
- Q2: A semiconductor has a positive temperature coefficient of resistance.
- Q3: The most commonly used semiconductor is silicon.
- Q4: A semiconductor generally has four valence electrons.
- Q5: The resistivity of pure germanium under standard conditions is about 6 x 10-4 Ω cm.
- Q6: The resistivity of pure silicon is about 6 × 103 Ω cm.
- Q7: When a pure semiconductor is heated, its resistance goes down.
- Q8: The strength of a semiconductor crystal comes from electron-pair bonds.
- Q9: When a pentavalent impurity is added to a pure semiconductor, it becomes an n-type semiconductor.
- Q10: Addition of pentavalent impurity to a semiconductor creates many free electrons.
- Q11: A pentavalent impurity has five valence electrons.
- Q12: A trivalent impurity has three valence electrons.
- Q13: Addition of trivalent impurity to a semiconductor creates many holes.
- Q14: A hole in a semiconductor is defined as the incomplete part of an electron pair bond.
- Q15: As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor decreases.
- Q16: A hole and electron in close proximity would tend to attract each other.
- Q17: In a semiconductor, current conduction is due to holes and free electrons.
- Q18: At room temperature, an intrinsic semiconductor has a few free electrons and holes.
- Q19: A forward-biased approximated pn junction diode has a resistance of the order of kΩ.
- Q20: The battery connections required to forward bias a pn junction are +ve terminal to p and -ve terminal to n.
- Q21: The barrier voltage at a pn junction for germanium is about 0.7 V.
- Q22: In the depletion region of a pn junction, there is a shortage of holes and electrons.
- Q23: A reverse bias pn junction has a very narrow depletion layer and very low resistance.
- Q24: With forward bias to a pn junction, the width of the depletion layer decreases.
- Q25: Under normal conditions, a diode conducts current when it is forward biased.
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Description
Test your knowledge on semiconductor physics with these model answers. This quiz covers key concepts such as covalent bonds, temperature coefficients, and impurity types. Ideal for students preparing for exams in semiconductor theory.
