Basic Electronics 2nd Sem Exam ECE/ECE/CSE/0664/2661 May 2016

Basic Electronics 2nd Sem EEE/ECE/CSE/0664/2661 May 2016 SECTION-A

Q1. Do as directed. 15×1=15

At absolute zero temperature, the conduction band of a semiconductor is totally Empty.
To obtain p-type Semiconductor, Trivalent impurity is added to a pure Semiconductor.
The value of knee voltage for germanium diode is 0.3 V
Maximum value of rectification efficiency of full wave rectifier can be 81.2%.
Usually, a Zener diode is used as a Voltage Regulator.
Material used for the construction of LED is GaAsP .
In a transistor, there are Two PN Junction.
A transistor is usually applied for Amplifier
The method by which the operating point is made independent of temperature variations or variations of transistor parameters (þ) is called Stabilization of Operating Point.
For a good voltage amplifier, its input impedance should be High.
A FET is also called as Unipolar Device .
Filter circuits are used to reduce ac Component.
PIV stands for Peak Inverse Voltage.
A capacitor circuit does not allow to pass dc components.
Define Drift.

SECTION-B

Q2. Attempt any five questions. 5×6=30

Explain with suitable diagram Intrinsic and Extrinsic Semiconductor.
Draw the block diagram of a power supply. Explain in brief the functioning of each
Explain how a Zener diode maintains constant voltage across the load.
Explain the working of npn transistor.
Describe the potential divider circuit in Details.
In what way the temperature variations affect the operating point of a transistor?
Explain the working principle of a FET?
Explain working of shunt capacitor filter

SECTION-C

Q3. Attempt any three questions. 3×10=30

With the help of circuit diagram explain the working of Full Wave Bridge Type Rectifier.
Explain the input and output characteristics of CE Configuration? Also derive the relation between α and β.
Explain Conductors, Insulators and Semiconductors on the basis their energy band diagrams.
Write a short note on (a) V-I characteristics of a diode (b) Atomic structure of Germanium atom

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Section a FILL IN THE BLANKS be paper

At absolute zero temperature, the conduction band of a semiconductor is totally ____

Empty

To obtain p-type Semiconductor, ________ impurity is added to a Pure Semiconductor.

Trivalent

The value of knee voltage for germanium diode is ____

0.3 V

The maximum value of rectification efficiency of full wave rectifier can be ______.

81.2%

Usually, a Zener diode is used as a ______.

Voltage Regulator

The material used for the construction of LED is _____.

GaAsP

In a transistor, there are Two PN Junction

Two

The method by which the operating point is made independent of temperature variations or variations of transistor parameters (þ) is called ______.

Stabilization of Operating Point

For a good voltage amplifier, its input impedance should be _____.

High

A FET is also called as ______Device

Uni-polar

Filter circuits are used to reduce ________

ac Component

PIV stands for _________

Peak Inverse Voltage

A capacitor circuit does not allow to pass _______

dc components

Define Drift

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Section B : BE PAPER MAY 2018 PAPER

Explain Intrinsic and Extrinsic Semiconductor with Suitable Diagram ?

Intrinsic and Extrinsic Semiconductor Click Here.

Block diagram of a power supply.
How a Zener diode maintains constant voltage across the load.
Explain the working of NPN Transistor ?

Working of NPN Transistor Click Here

Describe the potential divider circuit in Details.

Potential divider circuit Click Here

In what way the temperature variations affect the operating point of a transistor?

hybrid Parameter) of transistor

In what way the temperature variations affect the operating point of a transistor?

Temperature variations affect the operating point of a transistor

Explain the Phase reversal of output voltage with respect to input voltage in an Amplifier ?

Phase reversal of output voltage with respect to input voltage in an Amplifier

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