Total No. of Questions: 05 Total No. of Printed Pages: 02

Roll No.: _

BTEC 102B.Tech./ B.Tech. + M.Tech.1 B.Tech. + MBA

I Semester Examination, December 2017

[AU/ME/C E/EE/EC/IOT liT IMTXlEI/RLYITX]Fundamentals of Electronics Engineering

Choice Based Credit System (CBCS)

Time: 3 Hrs. Maximum Marks : 60Minimum Pass Marks: 24

Note: (1) All questions carry equal marks, out of which part tA' and 'B' carry 3 marks and part 'C' carries 6 marks.

(2) From each question. part tA' and 'B' are compulsory and part tC' has internal choice.

(3) Draw the neat diagram, wherever necessary.

(4) Assume suitable data wherever necessary.

Q.1.(A) Elaborate the impact of electronics in industries and in society. 03

(8) With the help of neat diagram explain the functioning of Electromechanical relay. 03(C) Derive the expression of current equation for PN junction diode. 06

OR

Describe various types of diodes with their functioning, symbolic representation and

their applications.

Q.2.(A) With the help of neat diagram explain the functioning of bridge rectifier with

capacitive filter. 03

(8) With the help of block diagram explain the functioning of Bipolar Junction Transistor. 03

(C) How Zener diode can act as voltage regulator?Consider for the following circuit Vin is 40 V, R, is 50 n, RL is 100 n and the

breakdown voltage of the zener diode is 20 V.

(a) What is the voltage drop across the load resistance RL?

(b) Calculate the current through the load resistor RL.

(c) What is the voltage drop across Rs?

(d) Calculate the current through Rs.

(e) What is the current through the zener diode? 06

Contd .

1

Rs Q.-----'\N\N\fL ~I"'.-"r-----,~~_r__-

I+-Vs-+l e+ I b-==- Vin

OR

Compare various CB,CC,CE configurations.

Q.3.(A) Explain the functioning of Voltmeter with circuit diagram.

(8) Explain the working of energy meter.

(C) Explain working of Cathode Ray Oscilloscope with the help of block diagram.

OR

Describe Wattmeter with the help of block diagram.

03

0306

Q.4.(A) Describe all two input logic gates along with truth table and symbolic representation. 03(8) Represent the following number in 1's and 2's complement format. 03

(C) a) (-45)d b) (-26)d

Implement XOR gate with the help of least number of NAND gate. 06OR

Implement following Boolean expression with the help of NAND and NOR gate

a) AB+CD

Q.S.(A) Plot the following continuous-time signals and write suitable expressions.

a) Unit Step b) Unit Ramp c) Sinusoidal Signal 0.;,

(8) Plot the following continuous-time signals and write suitable expression.

a) Triangular Pulse b) Rectangular Pulse c) Complex Exponential 03

(C) Determine which of the following signals are Energy or Power signals and also

determine their energy and power

a) Unit Ramp b) Sinusoidal c) Exponential Signal 06OR

Determine which of the following signal are Energy or Power signals and also

determine their energy and power

a) Unit Impulse b) Unit Step c) Unit Parabolic Signal

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