Question Paper: Electrical Circuit Analysis Question Paper - Dec 16 - Electrical And Electronics (Semester 3) - Jawaharlal Nehru Technological University (JNTUH)
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## Electrical Circuit Analysis - Dec 16

### Electrical And Electronics (Semester 3)

Total marks: 75
Total time: 3 Hours
INSTRUCTIONS

(1) Each question has 10 marks and may have a,b,c as sub questions.
(2) 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.
(3) Draw neat diagrams wherever necessary.

PART-A

1.a. Define capacitance. What is V-I relation of capacitance?
(2 marks) 00

1.b. What are the properties of super mesh?
(3 marks) 00

1.c. Define RMS value.
(2 marks) 00

1.d. What is significance of power factor?
(3 marks) 00

1.e. What is resonance?
(2 marks) 00

1.f. What are the circuit variables of a magnetic circuit?
(3 marks) 00

1.g. Define Graph.
(2 marks) 00

1.h. Draw a connected graph and explain.
(3 marks) 00

1.i. Define Norton's current.
(2 marks) 00

1.j. What are the limitations of superposition theorem?
(3 marks) 00

PART-B

2.a. Give the detailed classification of independent sources.
(5 marks) 00

2.b. Using Mesh analysis, find the voltage across $5\small \Omega$ resistor in the circuit below shown in figure 1.

(5 marks) 00

3.a. With an example explain about Kirchoff's laws.
(5 marks) 00

3.b. Using Nodal analysis , find the voltage 'V' in the circuit below shown In figure 2.

(5 marks) 00

4.a. Derive the expression for the average value and form factor of a sinusoidal waveform.
(5 marks) 00

4.b. In the circuit shown below in figure 3, if the power consumed by the $5\small \Omega$ resistor is 20W. Find the power factor and reactive power of the circuit w = 100 rad/sec
(5 marks) 00

5.a. Derive the relationships for real and reactive powers in a series RL circuit with sinusoidal excitation.
(5 marks) 00

5.b. Find the RMA voltage of the signal below in figure 4.

(5 marks) 00

6.a. Draw the impedance locus diagram of a parallel RC circuit and explain.
(5 marks) 00

6.b. For the magnetic current shown in figure 5, find the current I in the coil needed to produce a flux of 5.5 Wb in the air gap. The magnetic circuit has a uniform cross sectional area of $5cm^{2}$. Assume the relative permeability of the magnetic material as 3523, neglect leakage and fringing effect.

(5 marks) 00

(5 marks) 00

7.b. In a series of L = 10 mH and $C = 0.01\small \muF$ and $R = 50 \small \Omega$. Calculate the resonant frequency and also the impedance at the resonant frequency.
(5 marks) 00

8.a. What is loop method? Explain the analysis of networks with this method in detail.
(5 marks) 00

8.b. For the graph shown in figure6, determine the number of branches, sub graphs, trees and draw them.

(5 marks) 00
9.a. Define Duality. Explain with the help of an example.
(5 marks) 00

9.b. With the help of an example,Explain the procedure of formulating the Basic tie set matrix.
(5 marks) 00

10.a. With the help of an example , explain about compensation theorem.
(5 marks) 00

10.b. Using superposition theorem, find the current flows in $2\small \Omega$ resistor in the circuit shown in figure 7.

(5 marks) 00

11.a. With the help of an example , explain about Milliman's theorem.
(5 marks) 00

11.b. Using Thevenin's theorem, find the voltage 'V' in the circuit shown in figure 8.

(5 marks) 00