Hall Ticket No Question Paper Code: AEE002
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech II Semester End Examinations (Supplementary) July, 2018
Regulation: IARE R16
ELECTRICAL CIRCUITS
Time: 3 Hours (Common to ECE EEE) 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. State and explain Kirchhoff's laws with relevant circuits.
A dc circuit comprises of two resistors; resistor A of value 25 ohm and resistor B of unknown
value, connected in parallel, together with a third resistor C of value 5 ohm, connected in series
with the parallel branch. Find the voltage to be applied across the whole circuit and the value of
the resistor B if the potential difference across C is 90V, and the total power consumed is 4320W.

2. Classify different types of Ideal and Practical sources and dependent and independent sources.

In the circuit shown in Figure 1 Find IL and voltage drop across RL.
Figure 1
UNIT II
3. Determine the current in 5Ω resistor for the circuit shown in Figure 2.
Figure 2
Page 1 of 4
Find current I in the network shown in Figure 3 using star/delta transformation
Figure 3
4. Find node voltages in the circuit shown in Figure 4 using nodal analysis.
Figure 4
Obtain the dual of the network given in Figure 5
Figure 5
UNIT III
5. Define active and reactive power. Mention their units. Also explain the importance of power
factor in an ac circuit.
The current in a circuit is given by when the applied voltage is (225+j150)V. Determine(
the complex expression for the impedance stating whether it is inductive or capacitive ii)
power iii) phase angle between current and voltage.
Page 2 of 4
6. Derive the expression for current of a series R-C circuit excited with an AC sinusoidal voltage
source.
Find the RMS value of the periodic waveform given in Figure 6 with time period T.
Figure 6
UNIT IV
7. Explain the concept of Self Inductance and Mutual Inductance.
Determine the value of Q at resonance and bandwidth for the circuit given in Figure 7

Figure 7
8. Write a short notes on Dot Convention.
An iron ring of cross-sectional area 6cm2 is wound with a wire of 100 turns and has a sawcut
(length) of 2mm.Calculate the magnetizing current required to produce a magnetic flux of 0.1mwb
if mean length of magnetic path is 30cm and relative permeability of iron is 470.
Page 3 of 4
UNIT V
9. State and explain Maximum power transfer Theorem for AC and DC excitations.
Find the Thevenin's Equivalent circuit across the terminals a-b shown in Figure 8 .also find I.

Figure 8
10. State and explain Millman's Theorem.
Calculate current I in the circuit given in Figure 9 using superposition theorem.
Figure 9