Download JNTUA B.Tech 1-1 R13 2019 Dec 13A04101 Network Analysis Question Paper

Firstranker's choice

FirstRanker.com

Code: 13A04101

--- Content provided by FirstRanker.com ---

B.Tech I Year (R13) Supplementary Examinations December 2019

NETWORK ANALYSIS

(Common to ECE & EIE)

Time: 3 hours

Max. Marks: 70

--- Content provided by​ FirstRanker.com ---

PART - A

(Compulsory Question)

*****

1. Answer the following: (10 X 02 = 20 Marks)
   1. Write the tie-set matrix of the circuit shown in figure below.
      

   --- Content provided by‌ FirstRanker.com ---

   2. Draw the Thevenin equivalent resistance for the given network.
      
   3. A resistor in parallel with a capacitor absorbs 20 W when the combination is connected to a 240 V, 50 Hz source. If the power factor is 0.7 leading, what are the resistance and capacitance?
   4. If a coil draws 0.5A from a 120 V, 60 Hz source at 0.7 lagging power factor, what are the coil resistance and inductance?
   5. Determine the quality factor of a RLC series circuit R = 10O, C = 100µF and L = 0.01mH.

   --- Content provided by⁠ FirstRanker.com ---

   6. What values of inductor is to be used in a tank circuit to get a resonant frequency of 10 kHz and bandwidth of 1 kHz? The winding resistance is 300.
   7. Define the Z parameters.
   8. Define ideal filter.
   9. Give the relation between Decibel and Nepers.
   10. Design a constant- K low pass filter (T-section and ? section) having a cut-off frequency of 2 kHz to operate with a terminated load resistance of 5002.

   --- Content provided by​ FirstRanker.com ---

PART - B

(Answer all five units, 5 X 10 = 50 Marks)

UNIT - I

2. (a) Obtain the current Ix by Thevenin's theorem.
   

   --- Content provided by‍ FirstRanker.com ---

   
   (b) Calculate the current through R1 of the network using superposition theorem.
   
3. OR
4. (a) A resistive network shown in figure, setup corresponding tie-set matrix and obtain KVL equation.
   

   --- Content provided by‍ FirstRanker.com ---

   
   (b) A voltage source delivers 4A when the load connected is 50 and 2A when the load is 202. What is the maximum power it can deliver, power transfer efficiency when it delivers 50 W?

UNIT - II

4. (a) Calculate the currents i1(t) and i2(t) of the circuit shown. Assume initially relaxed condition and the switch is closed at t = 0.
   
   

   --- Content provided by‌ FirstRanker.com ---

   (b) Three coils are connected in series. Derive the expression for the equivalent inductance.
5. OR
6. In the circuit shown, the initial value of the charge on the capacitor is 20 V. Calculate: (i) i(t) for t>0. (ii) Time constant.
   

UNIT - III

--- Content provided by FirstRanker.com ---

6. (a) A coil of 10H and resistance of 102 is in with 100pF capacitor. The combination is connected across a generator of 100 V, having internal resistance of 100 kO. Determine: (i) Voltage across parallel circuit at resonance. (ii) Bandwidth.
   (b) Derive the expression for resonant frequency for a tank circuit.
7. OR
8. (a) In a series resonant circuit the resistance is 62, the resonant frequency is 4.1 x 10º rad/sec and the bandwidth is 105 rad/sec. Compute L and C of the network, half power frequencies and Q of the circuit.
   (b) Distinguish between reactance, impedance, admittance and suceptance.

--- Content provided by‌ FirstRanker.com ---

UNIT - IV

8. (a) For the bridged T network shown, find the driving point admittance y11 and transfer admittance Y21 with a 20 load resistor connected across port 2.
   
   (b) For the hybrid equivalent circuit shown, determine the current gain and voltage gain.
   

--- Content provided by⁠ FirstRanker.com ---

9. OR
10. Find the z parameters for the circuit shown in figure below.
    

UNIT - V

10. (a) Design a m-derived low pass filter having cut-off frequency of 2 kHz, design impedance of 5000 and the resonant frequency 2100 Hz.
    

    --- Content provided by​ FirstRanker.com ---

    (b) Design a constant-k high pass filter having a cut-off frequency of 1 kHz with a load resistance of 700O.
11. OR
12. Design a m-derived high pass filter with a cut-off frequency 5 kHz,design impedance 5000 and m = 0.4

*****

--- Content provided by⁠ FirstRanker.com ---