Question 11 Mark
Select one donor impurity from the following : Boron (B), Aluminum (Al) and Arsenic (As).
Answer
View full question & answer→Arsenic (As).
Questions
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23 questions · self-marked practice — reveal the answer and mark yourself.
Question 21 Mark
Name the crystal structure of intrinsic semiconductor.
Answer
View full question & answer→Tetrahedron.
Question 31 Mark
Write the names of any two compound (organic) semiconductors.###Write the names of any two organic compound semiconductors.
Answer
View full question & answer→(i) Anthracene (ii) Doped phthalocyanise.
Question 41 Mark
In the circuit symbol of a semiconductor diode, the arrow is pointing towards whom?
Answer
View full question & answer→From P to N.
Question 51 Mark
How does the junction plane behave in the case of reverse bias?
Answer
View full question & answer→Like an insulator.
Question 61 Mark
In the case of forward bias, the P end of a $P - N$ junction diode is connected to which terminal of the battery?
Answer
View full question & answer→Positive.
Question 71 Mark
In a P-N junction, what is the potential in the P-part near the junction plane?
Answer
View full question & answer→Negative potential.
Question 81 Mark
What is called depletion region?
Answer
View full question & answer→The region free from (devoid of) charge carriers located near the P-N junction is called depletion region.
Question 91 Mark
What are the minority charge carriers in the semiconductor obtained by doping pure Ge crystal with Al ?
Answer
View full question & answer→Electron.
Question 101 Mark
What is the majority charge carrier in the semiconductor obtained by doping pure Ge crystal with P ?
Answer
View full question & answer→Electron.
Question 111 Mark
What type of semiconductor will be obtained when pure Si crystal is doped with indium (In)?
Answer
View full question & answer→P-type.
Question 121 Mark
To make P-type semiconductor, impurity atoms are taken from?
Answer
View full question & answer→From third group.
Question 131 Mark
The impurity required to obtain N-type semiconductor belongs to which group of the periodic table?
Answer
View full question & answer→From fifth group.
Question 141 Mark
What is doping?
Answer
View full question & answer→Adding impurity atoms in the intrinsic semiconductor wafer is called doping.
Question 151 Mark
Tell the value and nature of charge on the hole.
Answer
View full question & answer→$1.6 \times 10^{-19}$, positive charge.
Question 161 Mark
Name any two semiconductor alloys.
Answer
View full question & answer→(1) Gallium Phosphide (Ga P), (2) missing.
Question 171 Mark
What is called intrinsic semiconductor?
Answer
View full question & answer→Naturally obtained semiconductors are called intrinsic semiconductors.
Question 181 Mark
Give two examples of intrinsic semiconductors.
Answer
View full question & answer→Germanium (Ge), Silicon (Si).
Question 191 Mark
Write the ratio of the number of free electrons and holes in an intrinsic semiconductor.
Answer
View full question & answer→$1: 1$
Question 201 Mark
Which of the following is a semi-conductor?
(i) Copper
(ii) Gallium Arsenide
(iii) Sulphur.
(i) Copper
(ii) Gallium Arsenide
(iii) Sulphur.
Answer
View full question & answer→Gallium Arsenide (Ga As).
Question 211 Mark
The majority charge carriers in $P$ and $N$ type semiconductors are :
(i)....
(ii)....
(i)....
(ii)....
Answer
View full question & answer→(i) Hole
(ii) Electron.
(ii) Electron.
Question 221 Mark
Answer
View full question & answer→Reverse bias.
Question 231 Mark
What type of semiconductor is obtained by adding impurity of gallium to germanium?
Answer
View full question & answer→P-type.