Download PTU B-Tech EEE 2020 Dec 3rd Sem 57095 Electronic Devices And Circuits Question Paper

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Total No. of Pages : 02

Total No. of Questions : 18

B.Tech. (EE) (2012 Onwards) / (Electrical & Electronics Engg.) (2011 Onwards)

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INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.



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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.


3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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Answer briefly :

1. How do you distinguish between tow leads of an LED?

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2. Why the space charge region is also called the depletion region?


3. How transistor “a” and “ß” are related?



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4. Why is the input impedance of the MOSFET very high?


5. List the ideal characteristics of operational amplifier.


6. Define CMRR.

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7. Why the series regulator is mostly commonly used regulator circuitry?


8. Define line and load regulation.



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9. State the conditions under which a feedback amplifier works as an oscillator?


10. What is the basic principle of operation of crystal oscillator?

SECTION-B

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11. Draw the circuit diagram of half wave rectifier. What is the minimum frequency of ripple in its output?


12. Draw CB configuration circuit diagram and explain with characteristics.

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13. Explain the working of RC phase shift oscillator and state some of its applications.


14. In the circuit shown below R₁ = 5kO and R₂ = 105 kO.
    
    

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    This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)