F2

Reg No.: Nam

Max. Marks: 100

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B.Tech degree examinations (S), September 2020 (S1/S2 - 2015 Scheme)

Course Code: EC100
Course Name: BASICS OF ELECTRONICS ENGINEERING

PART A
Answer all questions, each ೧೮111055 marks.

Briefly explain any five applications of electronics in medical field.
In what respect is an LED different from an ordinary PN junction diode? State
any three applications of LEDs.
With necessary circuit diagram and waveforms, explain the working of a half
wave Rectifier.
Define the terms input offset current, CMRR and slew rate of an Op-Amp.
Write the ideal values of these parameters.
What is the function of mixer in AM superheterodyne receiver? What is the
significance of IF frequency in AM receiver?
Define modulation. What are the needs for modulation?
Explain any one of the light sources used in optical fibre communication.
What is meant by frequency reuse in cellular system?
PART B
Answer six questions, one full question from each module and carries 10 marks.

Module 1
Write notes on specifications of a capacitor.

Explain the construction and working of relay. What are the different types of
relays?

OR
Explain the constructional details of

i) Carbon composition fixed resistors ii) Carbon potentiometers

A carbon resister has colour code violet, green and brown. Find the range of
resistance value.
Module 11

Explain the formation of depletion layer in a pn junction diode.

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Duration: 3 Hours

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