D 31109

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019
Course Code: BE101-04
Course Name: INTRODUCTION TO ELECTRONICS ENGINEERING

Max. Marks: 100 ⋅ Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks. Marks
1 Explain the colour coding for resistors. Indicate the colour code for a 3370, 2% (5)

tolerance resistor.
0 2 A Germanium diode carries a current of 1 mA at 20°C when a forward bias of )5(
0.15 V is applied. Estimate the reverse saturation current for that diode. Also,
calculate the forward bias voltage required to produce a diode current of 20 mA

at the same temperature.

3 What do you meant by Q-point? What are the factors affecting the stability of Q- (5)
point?
4 List the major difference between JFET and BJT. (5)
5 Draw and explain a voltage doubler circuit (5)
6 Explain the working of a zener diode regulator. (5)
7 Explain with block diagram the operation of analog multimeter (5)
മതം. ‏ب ب ہ0‎ +90900 ⋅
8 Explain the terms accuracy, precision, sensitivity related to electronic measuring (5)
instruments.
PART B
Answer six questions, one full question from each module and carries10 marks.
Module I
9 Explain the constructional details and features of a carbon film resistor and a (10)

wire wound resistor with the help of neat diagrams.

OR
10 a) Explain the working principle of electro mechanical relay with diagram. (7)
b) Explain the working principle of transformers with diagram. (3)
Module 11
1] Explain the ۷-1 characteristics of a Germanium diode at room temperature. Draw (10)

the V-I characteristics of the same diode at a higher temperature and explain the

effect of temperature on the graph.
OR

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