Question Paper: Basic Electronics : Question Paper May 2016 - First Year Engineering (Semester 2) | Gujarat Technological University (GTU)
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## Basic Electronics - May 2016

### First Year Engineering (Semester 2)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

### Choose an appropriate option from the following.

1(a)(i) Power is defined as the rate of transfer of _______ with respect to time.
(a) Charge   (b) Current   (c) Energy   (d) Voltage
(1 marks)
1(a)(ii) Mesh analysis is based on
(a) KVL   (b) KCL   (c) Both   (d) Law of conversion of energy
(1 marks)
1(a)(iii) If the network elements such as resistances, capacitances, inductances are not physically separable, then it is known as
(a) Lumped Network   (b) Distributed Network   (c) Unilateral Network   (d) Bilateral Network
(1 marks)
1(a)(iv) Which of the following is not applicable to the nonlinear network?
(a) Thevenin   (b) Norton   (c) Superposition   (d) KCL
(1 marks)
1(a)(v) For Non inverting amplifier the phase shift between input and output is
(a) 270°   (b) 45°   (c) 180°   (d) 0°
(1 marks)
1(a)(vi) Which one is Linear Application of Op-Amp?
(a) Comparator   (b) Differentiator   (c) Schmitt trigger   (d) Log Amplifier
(1 marks)
1(a)(vii) The decimal equivalent of Binary (1111110) is
(a) 125   (b) 128   (c) 255   (d) 126
(1 marks)
1(b)(i) The Digital Circuit which accepts many input and produces only one output is known as
(a) Encoder   (b) Demultiplexer   (c) Multiplexer   (d) Decoder
(1 marks)
1(b)(ii) Out of following signal,_______ is a Random Signal.
(a) Sine Wave   (b) Cosine Wave   (c) Noise   (d) Triangle Wave
(1 marks)
1(b)(iii) The antisymmetrical signal is also known as _______ Signal.
(a) Even   (b) Odd   (c) Energy   (d) Power
(1 marks)
1(b)(iv) Out of following _______ is digital Pulse Modulation.
(a) PAM   (b) PPM   (c) PCM   (d) PWM
(1 marks)
(a) 30kHz-300kHz   (b) 300kHz-3MHz   (c) 30Hz-300Hz   (d) 30MHz-300MHz
(1 marks)
1(b)(vi) Which of the following is used for AM Detection
(a) Slope detector   (b) Zero Crossing detector   (c) Envelope detector   (d) Phase locked loop
(1 marks)
1(b)(vii) If r(t) is input, c(t) is the output and G(s) is the transfer function, then for an impulse input
(a) G(s)=C(s)   (b) G(s)=R(s)C(s)   (c) G(s)=R(s)   (d) G(s)=0
(1 marks)
2(a) Explain Coulomb's First and Second Law.(3 marks) 2(b) Explain Kirchhoff's Voltage law and Current law in Short.(4 marks) 2(c) Explain Thevenin's theorem with suitable Example.(7 marks) 3(a) Give the Classification of Electric Network.(3 marks) 3(b) Draw the logic symbol and truth table of following gates.
1. AND   2. OR   3. EX-OR   4. NOR
(4 marks)
3(c) Write short note on JK flip flop with logic diagram and truth table.(7 marks) 4(a) Reduce the given Boolean expression using K-map.
F(A,B,C) = ∑m(0,2,3,5)
(3 marks)
4(b) Write short note on Star topology.(4 marks) 4(c) Explain ideal characteristics of ideal Op-Amp in detail.(7 marks) 5(a) Give the classification of signals.(3 marks) 5(b) Explain inverting configuration of Op-Amp.(4 marks) 5(c) Draw and explain basic elements of digital communication system.(7 marks) 6(a) What is multiplexing? Compare FDM and TDM(3 marks) 6(b) Write short note on Waveguides.(4 marks) 6(c) Draw and explain the block diagram of superheterodyne AM radio receiver.(7 marks) 7(a) Compare Open Loop and Closed Loop Systems.(3 marks) 7(b) Explain transient response and steady state response of system with diagram.(4 marks) 7(c) Explain any seven rules for block diagram reduction of control system with necessary diagram.(7 marks)