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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION(S), DECEMBER 2019

Course Code: BE101-04
Course Name: INTRODUCTION TO ELECTRONICS ENGINEERING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 5 marks. Marks
1 Explain the constructional details of ceramic capacitors with diagram. (5)
2 What are extrinsic and intrinsic semiconductors? Draw the crystalline structure (5)

of N-type semiconductor.

3 For a PNP transistor the base current and collector current are 45uA and 5.45mA (5)
respectively. Determine (1) values of 0 , 8 and (11) Base current required to make
collector current of 10 mA.

4 Why an FET is said to be a voltage controlled device? What is meant by pinch (൭)
off voltage of FET?

5 Draw circuit diagram of a negative clipping circuit. Draw its input and output (5)

wave forms and explain its operation

6 Define rectification efficiency. Calculate its value for a full wave rectifier. (5)
7 How can we test an NPN transistor using multi meter? (5)
8 Explain the terms accuracy, sensitivity, resolution related to electronic measuring (5)
instruments.
PART ‏تا‎
‎Answer six questions, one full question from each module and carries10 marks.
Module I

9 a) A carbon resistor has colour code orange, violet, yellow and silver. Find the (5)

range of resistance value.

b) What are the specifications of a capacitor? List the different types of capacitors (5)
OR
10 a) With a neat diagram, explain the working of an electromechanical relay. (7)
b) Compare an electromechanical relay with a solid state relay. (3)
Module 11
11 a) Give diode equation and explain the different terms. (4)
b) Discuss the forward and reverse characteristics of PN junction diode (6)
OR

12 a) Explain the principle of operation of an LED. List any two types of (5)

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