Question Paper: Basic Electronics : Question Paper Jun 2014 - First Year Engineering (Semester 2) | Gujarat Technological University (GTU)
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## Basic Electronics - Jun 2014

### 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.
1(1) In hydraulic system, Quantity named Flow is described as a Output flow rate F0,and in electrical quantity it is described as a_____.
(a) Voltage
(b)Current
(c) Capacitance
(d)nductance
(1 marks)
1(10) A radio station transmitting Am wave with 1MHz frequency band having a wavelength of____.
(a)3meter
(b)300meter
(c)0.3meter
(d) 30meter
(1 marks)
(a) 90MHz to 110MHz
(b) 70MHz to 120 MHz
(c) 110 Mhz to 180MHz
(d)88MHz to 108 MHz
(1 marks)
1(12) n Which process Sampling is used?
(a) Frequency Division ,
(b) Signal amplification,
(c) Signal attenuation,
(d)Digital Modulation
(1 marks)
1(13) Feedback control system in which the control action is dependent upon the ____.
(a) Input,
(b) Output,
(c)Compactness
(d)Cost of System
(1 marks)
1(14) For the unit step response of the control system, rise time is given by the value from_____of its final value.
(a)10% to 90%,
(b)20% to 99 %
(c) 10 % to 80% ,
(d) 30% to 100%.
(1 marks)
1(2) To find the linearity of the circuit network which theorem is used?
(a)KCL
(b)KVL
(c) Superposition
(d)Maximum power transfer
(1 marks)
1(3) For the operational amplifier with inverting configuration the change in the phase of the output voltage is_______.
(a)180°
(b)90°
(c)270°
(d)45°
(1 marks)
1(4) Which one is the Linear application design by Op-amp ?
(a)Integrator
(b)Voltage Regulator
(c) Multiper
(d) Comparator
(1 marks)
1(5) The equivalent Decimal of the BCD (001110001001) BCD is ______.
(a)(388)10
(b)(386)10
(c)(380)10
(d)(389)10
(1 marks)
1(6) Which are the logic gates kwon as a Universal Gates?
(a)XOR,AND
(b)AND,OR
(c)NAND,NOR
(d)XNOR,OR
(1 marks)
1(7) By using which theorem we can replace the whole circuit network in single voltage and resistor network ?
(a)Superposition
(b)Maximum power transfer
(c)Nortan's Theorem
(d)Thevenin's Theroem
(1 marks)
1(8) n the given pulse modulations, which one is n ot the type of pulse modulation?
(a)PWM
(b) PSK
(c) PPM
(d)PAM
(1 marks)
1(9) Even signals are stratify the property for signal x(t) =____.
(a)x(-t)
(b)-x(t)
(c) -x(t)/4
(d)-x(t)/2
(1 marks)
2(a) Explain in brief about Lumped circuit elements called resistorand capacitor(7 marks) 2(b)(1) Write a short note on Ammeter and Voltmeter (4 marks) 2(b)(2) Explain WYE -DELTA transformation in brief with necessary equations and circuit diagrams.(3 marks) 3(a) Determine the voltage across the 20 Ohm resistor in the following circuit of Figure.(a) with the application of superposition theorem

(7 marks) 3(b) Write about Differential amplifier using Op-amp with necessary circuit diagram and equations.(7 marks) 4(a) Describe band pass active filter using Operational amplifier with necessary diagrams and equations.(7 marks) 4(b)(1) For the switching function F = A(A'+B) , draw a corresponding set of logic blocks and write the truth table(3 marks) 4(b)(2) Reduce the given function using K-map. F(A,B,C,D) = ?mi (1,3,5,7,8,9,13,14) (4 marks) 5(a) (1) Write Short note on SR flip flop with circuit diagram and truth table(3 marks) 5(a) (2) Draw only ISO - 7 layer model block diagram of an OSI for computer Networks(4 marks) 5(b) Explain in detail Pulse modulation with necessary diagrams(7 marks) 6(a)(1) Draw only functional block diagram of signal processing system(3 marks) 6(a)(2) Explain in brief Product Modulation and Demodulation with necessary diagrams.(4 marks) 6(b) Write short not on Cellular communication system.(7 marks) 7(a)(1) Define Waveguide, Transmission lines and Antenna(3 marks) 7(a)(2) Explain any four rules of Block diagram reduction for control system with necessary block diagrams.(4 marks) 7(b) Draw and explain the typical unit step response (Transient Response) of the control system.(7 marks)