Download JNTUA B.Tech 1-1 R13 2017 Dec Supply 13A02101 Electrical Circuits Question Paper

Code: 13A02101

B.Tech I Year (R13) Supplementary Examinations December 2017

ELECTRICAL CIRCUITS

(Electrical & Electronics Engineering)

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Time: 3 hours Max. Marks: 70

PART - A

(Compulsory Question)

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1. Answer the following: (10 X 02 = 20 Marks)
   1. Mention any two similarities between electrical and magnetic circuits.
   2. Highlight the difference between independent and dependent sources.

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   3. An electric circuit carries a current of 10 Sin (373.2t-15º) by the emf excitation 200 Sin(373.2t-30°). Find the frequency and power factor.
   4. Show the circuit set-up for measuring active power in a 3-phase circuit using two watt meters.
   5. Why the series and parallel resonant circuits are called acceptor and rejecter circuits respectively?
   6. Differentiate Planar and Non-Planar Graphs with examples.
   7. State Reciprocity and Compensation theorems.

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   8. Show the equivalent circuit of two port network governed by open circuit impedance parameters.
   9. Why does Inductor does not allow changes in currents?
   10. Write down the time constants of RL and RC circuits.

PART - B

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

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UNIT - I

1. (a) A current i(t) shown below is made to pass through a pure inductance 20mH. Draw the voltage profile and indicate the voltages.

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