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Published on: 01/11/2019
Semiconductor Electronics
Download Tamil Nadu 12th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
The output of the following circuit is 1 when the input ABC is______.
101
100
110
010
2.
The given electrical network is equivalent to ______.
AND gate
OR gate
NOR gate
NOT gate
3.
Which one of the following represents forward bias diode?
4.
The electrical series circuit in digital form is
AND
OR
NOR
NAND
5.
If the input to the NOT gate is A = 1011, its output is ______.
0100
1000
1100
0011
6.
7.
The specific characteristic of a common emitter amplifier is _______________.
High input resistance
Low power gain
Signal phase reversal
Low current gain
8.
When a transistor is fully switched on, it is said to be _________________.
Shorted
Saturated
Cut-off
Open
9.
The light emitted in an LED is due to ______.
Recombination of charge carriers
Reflection of light due to lens action
Amplification of light falling at the junction
Large current capacity
10.
The principle based on which a solar cell operates is______.
Diffusion
Recombination
Photovoltaic action
Carrier flow
11.
The zener diode is primarily used as ______.
Rectifier
Amplifier
Oscillator
Voltage regulator
12.
If a positive half-wave rectified voltage is fed to a load resistor, for which part of a cycle there will be current flow through the load?
00–900
900–1800
00–1800
00–3600
13.
A forward biased diode is treated as ________________.
An open switch with infinite resistance
A closed switch with a voltage drop of 0V
A closed switch in series with a battery voltage of 0.7V
A closed switch in series with a small resistance and a battery
14.
If a small amount of antimony (Sb) is added to germanium crystal,______.
it becomes a p-type semiconductor
the antimony becomes an acceptor atom
there will be more free electrons than hole in the semiconductor
its resistance is increased
15.
The barrier potential of a silicon diode is approximately, ______.
0.7 V
0.3 V
2.0 V
2.2 V
1.
A = 1, B = 0, C = 1
y = A + B, y = (A + B).C
y = (1 + 0).1 ⇒ y = 1
2.
\(Y_1=\overline{A+B}, y_2=\overline{A+B}=A+B, y=\overline{A+B}\)
3.
(a)
4.
(a)
AND
5.
\(y=\overline{A}=\overline{1011}=0100\)
The Boolean expression for NOT gate, \(y=\bar{A}\)
6.
(d)
7.
(c)
Signal phase reversal
8.
(b)
Saturated
9.
(a)
Recombination of charge carriers
10.
(c)
Photovoltaic action
11.
(d)
Voltage regulator
12.
(c)
00–1800
13.
(d)
A closed switch in series with a small resistance and a battery
14.
(c)
there will be more free electrons than hole in the semiconductor
15.
(a)
0.7 V
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