Hall Ticket No Question Paper Code: AEE018
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
Four Year B.Tech III Semester End Examinations (Regular) November, 2018
Regulation: IARE R16
BASIC ELECTRICAL AND ELECTRONICS ENGINEERING
Time: 3 Hours (Common to AE ME CE) Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Explain the basic parts of indicating instruments with neat sketch.
Calculate the current through 20Ω resistor for given Figure 1.
Figure 1
2. State Kirchhoff's voltage law and current law. Explain the Faraday's laws of electromagnetic
induction.
Determine the resistance between A and C shown in Figure 2 using star delta transformation.

Figure 2
UNIT II
3. Explain the principle of operation of DC Generator with a neat sketch.
A 6 pole DC machine has 400 conductors and each conductor can carry 80A. Flux/pole is 0.020
Wb and the machine is driven at 1800 rpm. Calculate power developed in armature and electromagnetic
torque if conductors are wave and lap connected windings.
4. Derive the equation of torque developed in a DC motor. Give the applications of DC motors.

What is the purpose of commutator in a DC machine? Derive the EMF equation of DC generator.

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UNIT III
5. Explain the principle of operation of a 1Φ transformer. Derive the equation of induced EMF in
a 1Φ transformer.
Explain the types of losses, efficiency and regulation of a transformer.
6. Explain the principle of operation of alternator with neat sketch
Explain the procedure to determinate regulation of an alternator by synchronous impedance
method.
UNIT IV
7. Draw and explain the input and output V-I characteristics of PN junction diode
A center-tapped full-wave rectifier connected to a transformer whose each secondary coil has a
r.m.s. voltage of 12 V. Assume the internal resistances of the diode and load resistance are 50

and 1k
respectively. Find:
i. The load current measured by a voltmeter.
ii. The D.C. load current.
8. Explain the working of bridge rectifier with waveforms.
Determine DC output voltage, PIV, rectification efficiency of the given circuit.
Figure 3
UNIT V
9. Explain the input and output characteristics of a BJT in common collector configuration.
For the circuit shown in figure 4 find the emitter, base and collector voltages and currents. Use
50, assume VBE 0.8V independent of current level.
Figure 4
10. Explain how load line is drawn for biasing a transistor.
For a transistor circuit having ICBO=5 and IB=100 find IC and IE.