JNTU

JNTU B.Tech I Year BASIC ELECTRICAL AND ELECTRONICS ENGINEERING Previous Question Paper (August - 2018 - R16)

B.Tech | I Year | II Semester | R16 | August - 2018

Answer PaperPaper Code: 132AJMaximum Marks: 75Time: 3 hours

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.

PART A

125 marks
a
Write the VI relationship for R, L, C elements.
2 marks

Answer

The VI relationships are: For Resistor (R), v = iR. For Inductor (L), v = L(di/dt). For Capacitor (C), i = C(dv/dt).

b
Draw wave forms for voltage, current, power for a pure capacitance when excited by a sinusoidal voltage.
3 marks

Answer

For a pure capacitor, the current leads the voltage by 90 degrees. The voltage waveform is a sine wave, the current waveform is a cosine wave, and the power waveform is a sine wave oscillating at twice the frequency of the supply with zero average value.

c
State super position theorem.
2 marks

Answer

Sign in to view the complete answer paper.

d
Define bandwidth and quality factor for RLC series resonant circuit and give expression.
3 marks

Answer

Sign in to view the complete answer paper.

e
Write diode current equation and mention how it supports reverse bias condition.
2 marks

Answer

Sign in to view the complete answer paper.

f
Draw the circuit of full wave bridge rectifier with load.
3 marks

Answer

Sign in to view the complete answer paper.

g
Define h-parameters in CE configuration of BJT.
2 marks

Answer

Sign in to view the complete answer paper.

h
Compare CE and CB characteristics of a transistor.
3 marks

Answer

Sign in to view the complete answer paper.

i
Draw the symbols of SCR and varactor diode.
2 marks

Answer

Sign in to view the complete answer paper.

j
What is pinch-off voltage for a JFET?
3 marks

Answer

Sign in to view the complete answer paper.

PART B

210 marks
a
State and explain Kirchoff’s laws.
5 marks

Answer

Sign in to view the complete answer paper.

b
Using node voltage method to find the current in the 10Ω resistance of the following circuit shown in figure1.
5 marks

Answer

Sign in to view the complete answer paper.

OR
310 marks
a
Derive the expressions for average value, RMS value crest factor and form factor for a sinusoidal wave form.
5 marks

Answer

Sign in to view the complete answer paper.

b
A resistance of 60Ω is connected in series with a pure inductor of 350 mH. The circuit is connected across a 50 Hz sinusoidal supply and the voltage across resistance is 150V. Calculate the supply voltage.
5 marks

Answer

Sign in to view the complete answer paper.

410 marks
a
Derive the expressions for resonant frequency, half power frequencies for a RLC series circuit.
7 marks

Answer

Sign in to view the complete answer paper.

b
An RLC circuit comprising of a 10Ω resistance is to have a bandwidth of 100 rad/s. Determine the value of capacitance to make the system to resonate at 400 rad/s.
3 marks

Answer

Sign in to view the complete answer paper.

OR
510 marks
a
Use Thevenins theorem to find the current in the load resistance RL of the following circuit shown in figure 2.
5 marks

Answer

Sign in to view the complete answer paper.

b
Calculate the load current in the following circuit shown in figure 3 using Millman’s Theorem.
5 marks

Answer

Sign in to view the complete answer paper.

610 marks
a
Draw volt-Ampere characteristic of a PN junction diode and explain.
5 marks

Answer

Sign in to view the complete answer paper.

b
Define ‘Ripple Factor’ and derive an expression for ripple factor of a full wave rectifier.
5 marks

Answer

Sign in to view the complete answer paper.

OR
710 marks
a
Differentiate between static and dynamic resistances of a diode.
5 marks

Answer

Sign in to view the complete answer paper.

b
Explain how a centre tapped transformer type full wave rectifier works with suitable schematic and waveforms.
5 marks

Answer

Sign in to view the complete answer paper.

810 marks
a
Draw the h-parameter equivalent circuit of BJT in CC configuration. Derive expressions for Av and Zi.
5 marks

Answer

Sign in to view the complete answer paper.

b
Derive expression for stability factor(s) of voltage divider bias configuration.
5 marks

Answer

Sign in to view the complete answer paper.

OR
910 marks
a
Explain the Emitter feedback bias method with relevant diagram and mathematical expression.
5 marks

Answer

Sign in to view the complete answer paper.

b
Draw h-Parameter equivalent circuits of BJT in complete and simplified CB configuration.
5 marks

Answer

Sign in to view the complete answer paper.

1010 marks
a
Explain how zener breakdown Occurs. Indicate breakdown region zener-diode characteristics.
5 marks

Answer

Sign in to view the complete answer paper.

b
Compare BJT and FET.
5 marks

Answer

Sign in to view the complete answer paper.

OR
11
Explain the construction and principle of operation of
10 marks
a
JFET
5 marks

Answer

Sign in to view the complete answer paper.

b
Tunnel diode.
5 marks

Answer

Sign in to view the complete answer paper.

About this paper

This page contains the solved question paper with answers of BASIC ELECTRICAL AND ELECTRONICS ENGINEERING from JNTU for B.Tech MNE-MIE I Year II Semester, August - 2018, R16.

For the question paper without answers, switch to the Question Paper tab.

Other papers in BASIC ELECTRICAL AND ELECTRONICS ENGINEERING

Loading Question Papers

Fetching data from database...