R09 - December, 2011 - Regular Examinations - Set - 2.

B.Tech II Year - I Semester Examinations, December 2011
ELECTRICAL CIRCUITS
(COMMON TO EEE, ECE, ETM)
Time: 3 hours Max. Marks: 75
Answer any five questions
All questions carry equal marks
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1.a) Calculate the power absorbed by each component in the circuit shown in below Figure.1.
Figure.1
b) Consider the resistance shown below Figure (a). A voltage v(t) of waveform given in Figure (b) is applied at its terminals. Obtain the waveform of current through it. [7 8]
2. Perform both node and mesh analysis for the circuit shown in below Figure.2 to determine all the branch voltages and currents. [15]
Figure.2
3.a) Find the input impedance of the circuit shown in below Figure.3. Assume that the circuit
operates at ? = 50 rad/s.
Figure.3

b) Find I in the circuit shown in below Figure.4. [5 10]
Figure.4
4. A series-connected RLC circuit has R = 4 and L = 25 mH.
a) Calculate the value of C that will produce a quality factor of 50.
b) Find ?1, ?2, and B.
c) Determine the average power dissipated at ? = ?0, ?1, ?2. Take Vm = 100 V. [15]
5. Find current Io in the circuit shown in below Figure.5. [15]
Figure.5
6. Draw a suitable tree and dual network. Use general loop analysis to find i0 in the circuit shown in below Figure.6. [15]
Figure.6

7. With suitable example explain Tellegen’s theorem for DC networks. For the circuit shown in below Figure.7, find the Norton’s equivalent circuit between terminals a and b.
[15]
Figure.7
8. With suitable example explain Reciprocity theorem for AC circuits. Find the Thevenin’s equivalent circuit of the circuit shown in below Figure.8 as seen from
a) terminals a-b b) terminals c-d [15]
Figure.8
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