Semiconductor Electronics · Physics · NEET
MCQ (Single Correct Answer)
A full wave rectifier circuit with diodes $\left(D_1\right)$ and $\left(D_2\right)$ is shown in the figure. If input supply voltage $\mathrm{V}_{\text {in }}=220 \sin (100 \pi t)$ volt, then at $t=15 \mathrm{msec}$
The output ( $Y$ ) of the given logic implementation is similar to the output of an/a ________ gate.
The I-V characteristics shown above are exhibited by a
When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a
The output Y for the inputs A and B of the given logic circuit is:
A logic circuit provides the output $$Y$$ as per the following truth table :
The expression of the output Y is :
Consider the following statements A and B and identify the correct answer :
A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph.
B. In a reverse biased $$p n$$ junction diode, the current measured in $$(\mu \mathrm{A})$$, is due to majority charge carriers.
$$ \text { The output ( } Y \text { ) of the given logic gate is similar to the output of an/a } $$
On the basis of electrical conductivity, which one of the following material has the smallest resistivity?
The given circuit is equivalent to:
A p-type extrinsic semiconductor is obtained when Germanium is doped with:
The above figure shows the circuit symbol of a transistor. Select the correct statements given below:
(A) The transistor has two segments of p-type semiconductor separated by a segment of n-type semiconductor.
(B) The emitter is of moderate size and heavily doped.
(C) The central segment is thin and lightly doped.
(D) The emitter base junction is reverse biased in common emitter amplifier circuit.
Given below are two statements:
Statement I : Photovoltaic devices can convert optical radiation into electricity.
Statement II : Zener diode is designed to operate under reverse bias in breakdown region.
In the light of the above statements, choose the most appropriate answer from the options given below :
A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
For the following logic circuit, the truth table is:
Identify the equivalent logic gate represented by the given circuit
The incorrect statement about the property of a Zener diode is :
The collector current in a common base amplifier using n-p-n transistor is 24 mA. If 80% of the electrons released by the emitter is accepted by the collector, then the base current is numerically :
In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in
As the temperature increases, the electrical resistance
In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be
The truth table for the given logic circuit is
(A) A Zener diode is connected in reverse bias, when used as a voltage regulator.
(B) The potential barrier of p-n junction lies between 0.1 V to 0.3 V.













then the output across RL will be

(1) type of semiconductor material
(2) amount of doping
(3) temperature
Which one of the following is correct ?

Which of the following statement is correct ?









Pick out which ones are for AND, NAND and NOT gates, respectively

The logic gate is
(1) Base, emitter and collector regions should have similar size and doping concentrations.
(2) The base region must be vety thin and lightly doped.
(3) The emitter-base junction is forward biased and base-collector junction is reverse biased.
(4) Both the emitter-base junction as well as the base-collector junction are forward biased.
Which one of the following pairs of statements is correct?


The logic symbols for OR, NOT and NAND gates are respectively



The voltage waveforms of A, B and C are as shown below.

The logic circuit gate is

$$\matrix{ A & B & Y \cr 1 & 1 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 0 & 0 & 1 \cr } $$
$$\matrix{ A & B & Y \cr 1 & 1 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 0 & 0 & 1 \cr } $$
