Download OU B.Sc 2018 Dec 2nd Year 3080 Electronics Analog Circuits Question Paper

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FACULTY OF SCIENCE

B.Sc. II - Semester (CBCS) Examination, November / December 2018

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Subject : ELECTRONICS (Analog Circuits)

Paper - III (DSC)

Time : 3 hours

Max. Marks : 80

Part - A (5 X 4 = 20 Marks)

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(Short Answer Type)

Note : Answer any Five of the following questions

1. Explain choke input filter.
2. What is Regulation? Define Ripple factor.
3. Draw and explain the block diagram of regulated power supply.

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4. Explain briefly about three terminal IC regulators.
5. Briefly discuss about the classification of amplifiers.
6. Explain positive and negative feedback in amplifiers.
7. Obtain expression for Barkhausen criterion for sustained oscillations.
8. Explain Astable multivibrator.

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Part - B (4 X 15 = 60 Marks)

(Essay Answer Type)

Note : Answer all from the following questions.

1. a) Draw the circuit diagram of an L-section filter and derive equation for its ripple factor.
   OR
   

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   b) Draw the circuit diagram of bridge rectifier and explain its circuit action and derive an expression for efficiency and ripple factor.
2. a) Explain Series and Shunt transistor regulated power supplies.
   OR
   b) Explain principle and working of Switch Mode Power Supply (SMPS).
3. a) Draw the circuit diagram of single stage RC coupled amplifier and explain frequency response curve.

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