Electronic Devices and Circuits MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Electronic Devices and Circuits, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Electronic Devices and Circuits MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Electronic Devices and Circuits mcq questions that explore various aspects of Electronic Devices and Circuits problems. Each MCQ is crafted to challenge your understanding of Electronic Devices and Circuits principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Electronic Devices and Circuits MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

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Electronic Devices and Circuits MCQs | Page 62 of 82

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Q611.
Which of the following has highest conductivity?

a.

Silver

b.

Aluminium

c.

Tungsten

d.

Platinum

Discuss
Answer: (a).Silver
Q612.
In a bipolar junction transistor the base region is made very thin so that

a.

recombination in base region is minimum

b.

electric field gradient in base is high

c.

base can be easily fabricated

d.

base can be easily biased

Discuss
Answer: (a).recombination in base region is minimum
Q613.
Compared to bipolar junction transistor, a JFET has

a.

lower input impedance

b.

high input impedance and high voltage gain

c.

higher voltage gain

d.

high input impedance and low voltage gain

Discuss
Answer: (d).high input impedance and low voltage gain
Q614.
An incremental model of a solid state device is one which represents the

a.

ac property of the device at desired operating point

b.

dc property of the device at all operating points

c.

complete ac and dc behaviour at all operating points

d.

ac property of the device at all operating points

Discuss
Answer: (a).ac property of the device at desired operating point
Q615.
What is the correct sequence of the following step in the fabrication of a monolithic, Bipolar junction transistor?

1. Emitter diffusion
2. Base diffusion
3. Buried layer formation
4. E pi-layer formation

Select the correct answer using the codes given below:

a.

3, 4, 1, 2

b.

4, 3, 1, 2

c.

3, 4, 2, 1

d.

4, 3, 2, 1

Discuss
Answer: (d).4, 3, 2, 1
Q616.
For an n-channel enhancement type MOSFET, if the source is connected at a higher potential than that of the bulk (VSB > 0), the threshold voltage VT of the MOSFET will

a.

remain unchanged

b.

decrease

c.

change Polarity

d.

increase

Discuss
Answer: (a).remain unchanged
Q617.
Which of the following is used for generating time varying wave forms?

a.

MOSFET

b.

PIN diode

c.

Tunnel diode

d.

UJT

Discuss
Answer: (d).UJT
Q618.
Calculate the resistivity of n-type semiconductor from the following data, Density of holes = 5 x 10¹² cm¯³. Density of electrons = 8 x 10¹³ cm¯³, mobility of conduction electron = 2.3 x 10โด cm²/ V-sec and mobility of holes = 100 cm²/V-sec.

a.

0.43 ฮฉ-m

b.

0.34 ฮฉ-m

c.

0.42 ฮฉ-m

d.

0.24 ฮฉ-m

Discuss
Answer: (b).0.34 ฮฉ-m
Q619.
The static characteristic of an adequately forward biased P-n junction is a straight line, if the plot is of __________ Vs โ†’ versus

a.

log I Vs log V

b.

log I Vs V

c.

I Vs log V

d.

I Vs V

Discuss
Answer: (b).log I Vs V
Q620.
In an n channel JFET

a.

ID, IS and IG are considered positive when flowing into the transistor

b.

ID and IS are considered positive when flowing into transistor and IG is considered positive when flowing out of it

c.

ID, IS, IG are considered positive when flowing out of transistor

d.

IS and IG are considered positive when flowing into transistor and ID is considered positive when flowing out of it

Discuss
Answer: (a).ID, IS and IG are considered positive when flowing into the transistor
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