Download JNTUA B.Tech 1-1 R13 2017 Dec Supply 13A99101 Basic Electrical and Electronics Engineering Question Paper

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Code: 13A99101

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

BASIC ELECTRICAL & ELECTRONICS ENGINEERING

(Common to CSE and IT)

Answer all the questions

(Use single answer booklet only)

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Time: 3 hours Max. Marks: 70

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PART - A

UNIT-I

1. Find the equivalent resistance between the terminals AB using Delta-Star transformation for the circuit shown below:
   

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   AO
   3 O
   2 O
   5 O
   Req
   

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   15 O
   5O
   BO
2. OR
   Determine root mean square value, average value, peak factor and form factor for the following waveform.
   

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   2
   0.5
   1
   -2
   3
   

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   t (sec)
   2 2.5
   3

UNIT - II

3. Find the current I through 2O resistance using superposition theorem for the circuit shown below:
   

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   +
   5 V
   V
   ?O ?6O
   2A

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4. OR
   A two part network has the following z - parameters. Find the h parameters and transmission parameters: Z11 = 12; Z12 = Z21 = 0.2O; ?22 = 0.6O.

UNIT - III

5. Explain in detail the principle of operation and characteristics of DC motors.
6. OR
   

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   With a neat diagram, explain the construction of 3 - phase induction motor.

Contd. in page 2

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PART - B

UNIT-I

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7. Explain the operation of forward bias and reverse bias PN junction Diode.
8. OR
   Explain the operation of p section filter with bridge rectifier and also derive an expression for its stability factor.

UNIT - II

9. Draw and explain the input and output characteristics of a transistor in CC configuration.

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10. OR
    Describe the kind of operation that takes place in the enhancement mode MOSFET. How does this differ from depletion mode type?

UNIT - III

11. Explain the working of Colpitts oscillator and derive an expression for frequency of oscillation for Colpitts oscillator.
12. OR
    

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    Give the characteristics of an ideal Op-Amp.

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