Examples of inorganic semiconductors is:
- AGe
- ✓CdS
- Canthracene
- Dpolyanilie
Answer: B.
View full solution →Question types
Semiconductor Electronics: Materials, Devices and Simple Circuits question types
89 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
89
Questions
6
Question groups
5
Question types
01
M.C.Q [1M]
29 Q→021 Marks Question
23 Q→03Short Answer Type Questions [2M]
9 Q→043 Marks Question
7 Q→05Long Answer Type Questions [5M]
11 Q→06Fill in the blanks.[1M]
10 Q→Sample Questions
Semiconductor Electronics: Materials, Devices and Simple Circuits questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
When a forward bias is applied to a p-n junction, it
- Araises the potential barrier.
- Breduces the majority carrier current to zero.
- ✓lowers the potential barrier.
- DNone of the above.
Answer: C.
View full solution →In an unbised p-n junction, holes diffuse from the p-region to n-region because
- Afree electrons in the n-region attract them.
- Bthey move across the junction by the potential difference.
- ✓hole concentration in p-region is more as compared to n-region.
- DAll the above.
Answer: C.
View full solution →Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to $\left(E_g\right)_C,\left(E_g\right)_{S i}$ and $\left(E_g\right)_{G e}$. Which of the following statements is true?
- A$\left( E _{ g }\right)_{ Si }<\left( E _{ g }\right)_{ Ge }<\left( E _{ g }\right)_{ C }$
- B$\left( E _{ g }\right)_{ C }<\left( E _{ g }\right)_{ Ge }>\left( E _{ g }\right)_{ Si }$
- ✓$\left( E _{ g }\right)_{ C }>\left( E _{ g }\right)_{ Si }>\left( E _{ g }\right)_{ Ge }$
- D$\left( E _{ g }\right)_{ C }=\left( E _{ g }\right)_{ Si }=\left( E _{ g }\right)_{ Ge }$
Answer: C.
View full solution →In an n-type silicon, which of the following statement is true :
- AElectrons are majority carriers and trivalent atoms are the dopants.
- BElectrons are minority carriers and pentavalent atoms are the dopants.
- ✓Holes are minority carriers and pentavalent atoms are the dopants.
- DHoles are majority carriers and trivalent atoms are the dopants.
Answer: C.
View full solution →Name the crystal structure of intrinsic semiconductor.
Write the names of any two compound (organic) semiconductors.###Write the names of any two organic compound semiconductors.
In the circuit symbol of a semiconductor diode, the arrow is pointing towards whom?
How does the junction plane behave in the case of reverse bias?
In the case of forward bias, the P end of a $P - N$ junction diode is connected to which terminal of the battery?
View full solution →In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of a full-wave rectifier for the same input frequency?
What is the width of the depletion layer of a P-N junction when it is (i) forward biased (ii) reverse biased?
What are the effects on the depletion layer when the diode is connected in forward bias and reverse bias condition?
Explain current flow in N- and P-type semiconductors.
How does the conductivity of semiconductors increase with increasing temperature?
What is called P-N junction? Name the methods of making P-N junction. Explain the diffusion method of making $P - N$ junction.
View full solution →
Classify metals, conductors and semiconductors.
Explain the difference between conductor, insulator and semiconductor on the basis of energy band in solids.
What is called extrinsic semiconductor? Explain doping process.
What are N-type semiconductors? Their conductivity is higher than that of pure semiconductors. Why? Explain with figure.
On the basis of band theory, differentiate between conductors, insulators and conductors.
What is meant by rectification? Draw a diagram of a half wave rectifier electric circuit. Write a brief description of its working. Draw the waveforms of input voltage and output voltage for this rectifier circuit.
What is meant by forward bias and reverse bias of p-n junction diode? Draw experimental electrical circuit diagram to study V-I characteristic in forward bias and reverse bias of p-n junction diode. Draw forward bias and reverse bias V-I characteristic curves of p-n junction diode and briefly explain the following :
(i) Threshold or cut-in voltage
(ii) Breakdown voltage.
(i) Threshold or cut-in voltage
(ii) Breakdown voltage.
Explain the concept of energy bands with a figure.
_________ types of extrinsic semiconductors are formed. (N and P).
Resistivity of semiconductor is __________ increasing the temperature.
In p-type semiconductor the majority charge carriers are __________ and the minority charge carriers are __________ .
p-n junction diode is used for __________ .
The output voltage of a full wave rectifier is a pulse and a __________ voltage.
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