Solve any one question from Q.1(a,b) & Q.2(a,b)

1(a)
State Thevenin theorem and find the equivalent circuit for the circuit shown below. Find the current through the (2+j2) Ω

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6 M

1(b)
Consider the below circuit

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1) Draw the corresponding graph.

2) Obtain the complete incident matrix and reduced incident matrix.

3) Find the possible number of trees.

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1) Draw the corresponding graph.

2) Obtain the complete incident matrix and reduced incident matrix.

3) Find the possible number of trees.

6 M

2(a)
State Norton theorem and find the Norton's equivalent circuit across AB in circuit shown below.

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6 M

2(b)
Explain the following term with example: 1) Tie set matrix

2) Incident matrix

3) Oriented graph.

2) Incident matrix

3) Oriented graph.

6 M

Solve any one question from Q.3(a,b) & Q.4(a,b)

3(a)
Determine the expression for current flowing through the inductor (i(t)) of the circuit shown below

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6 M

3(b)
A circuit consisting of a resistance of 4Ω and inductor of 0.5 H and a variable capacitor all in series connected across 100 V, 50Hz supply. At resonance calculate:

1) Capacitor

2) Voltage across the inductor

3) Q factor

4) Current in the circuit.

1) Capacitor

2) Voltage across the inductor

3) Q factor

4) Current in the circuit.

6 M

4(a)
The circuit shown below. Find the expression for V

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_{c}(t) and i_{c}(t). Initially the switch is open and at t = 0 is closed.!mage

6 M

4(b)
Show that the value of capacitance for maximum voltage across the capacitor in case of series resonance circuit with capacitor tunning is given by: \[C=\frac{L}{R^2+X^2_L}\]

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6 M

Solve any one question from Q.5(a,b) & Q.6(a,b)

5(a)
For symmetrical network. Derive the expression for Z

_{oc}, Z_{sc}and Z_{o}.
6 M

5(b)
Eaxh of two series element of 'T' type LPF consists of an inductor of 60 mH and shunt element 0.2 μf capacitor . Calculate cut off frequency and design impedance at 1 kHz. Also find the ratio of phase difference between i/p and o/p voltages of the filter al 1 kHz and 5 kHz.

7 M

6(a)
An attenuator is composed of symmetrical 'T' section having series arm of 175Ω each, and shunt arm 350 Ω. Findt the characteristic impedence and attenuation in dB.

6 M

6(b)
Explain the 'm' derived filter and design 'T' and 'π' section of a prototype HPF having cutoff frequency of 20 kHz and design mpedance of 450 Ω also find the characteristic impedance at 25 kHz and attenuation at 4 kHz.

7 M

Solve any one question from Q.7(a,b) Q.8(a,b)

7(a)
What is mean by network function? Explain various types of network functions for one port and two port network.

6 M

7(b)
Find the 'Y' parameter of network shown below

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7 M

8(a)
Find the 'Z' parameter of the network shown below.

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6 M

8(b)
Derive the condition of Reciprocity and Symmetry for 'Y' parameters in '2' port network.

7 M

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