Sathyabama University BE 6C0026-613PT101-6CPT0024 (2006/07/08/09/2010-JAN) Circuit Theory Dec 2010

Register Number

                               

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act, 1956)

Course & Branch: B.E/B.Tech - P-ECE/CSE/E&C/EEE/IT

P-ECE/P-EEE (JAN/JUN)

Title of the Paper: Circuit Theory                          Max. Marks: 80

Sub. Code: 6C0026-613PT101-6CPT0024 (2006/07/08/09/2010-JAN)

Time: 3 Hours

Date: 09/12/2010                                                    Session: AN

______________________________________________________________________________________________________________________

PART - A                (10 X 2 = 20)

Answer ALL the Questions

1.       Find the Current in 4W Resistor.

2.     What is the condition for maximum power transfer in DC and AC circuit?

3.     How does an inductor act at t=0 and t=a

4.     A resistance of 50 ohms and an inductance 0.03H are connected in series with a voltage source of 10V, find the time constant of the circuit.

5.     Determine the Resonance frequency for the RLC series circuit, R=10, L=0.5mH, C=10mf.

6.     Draw the Voltage Response across each element in RL series current, when it is subjected to constant DC voltage.

7.     Mention the relation between “Twigs and Links”.

8.     What do you mean by “Graph and Path”?

9.     Mention the application of PSPICE.

10.   Define – Fourier analyses.

  PART – B                     (5 x 12 = 60)

Answer All the Questions

11.   What should be the value of R_L in given fig such that maximum power transfer occur from source to load, find the power occurs R_L load.

 (or)

12.   Using Thevenin thermo, find the current through (2+2j)W impedance in fig.

       

13.   If the initial voltage stored in the capacitor is zero volts, find Vc in the circuit of fig. The figure represents the circuit condition at t=0+

(or)

14.   Find the current in a series RL circuit having R=2W and L= 10H while a D.C voltage of 100 v is applied. What is the value of this current after 5 sec of switching ON?

15.   Two coupled coils have self inductance L₁=50 mH and L₂=70mH. The coefficient of coupling K being 0.065 in the air. Find voltage in the second coil and the flux of the first coil provided the second coil has 500 turns and the circuit current is given by i₁=5sin314 t.

(or)

16.   A current source having an internal resistance of 10KW feeds back a tank circuit containing a coil having Lc=200mH, Rc=10W in parallel to capacitor of 100mF. Find the frequency of resonance and Q factor.

17.   A resistive network in show in fig. set up corresponding tie – set matrix and obtains KVL equation.

(or)

18.   Draw the oriented graph of the figures shown in fig. also contains the fundamental cut set matrix.

19.   Explain in detail the design and various implementation steps for transient analyses of RLC circuit.

(or)

20.   Explain in detail the design and various implementation steps for series RC resonance circuit analyses.

Share This