EC6202 Electronic Devices & Circuits Question Bank : dmice.ac.in
Name of the College : DMI College OF Engineering
Subject : Electronic Devices And Circuits
Website : dmice.ac.in
Document type : Question Bank
Download Electronic Devices And Circuits Question Paper : https://www.pdfquestion.in/uploads/dmice.ac.in/457-01AUG14_SEM3-Civil%20.pdf
DMICE Electronic Devices & Circuits Question Bank
Time : 3 Hours
Answer ALL Questions :
Max.Marks : 100
Related : DMICE EC2401 Wireless Communication B.E Question Bank : www.pdfquestion.in/2773.html
PART – A
1. What is meant by depletion region in a PN junction diode?
2. A silicon PN junction has reverse saturation current of 10nA at VT is 26mV.
Calculate the junction current when the applied Voltage is 0.7V in forward bias.
3. What is break down? What are its types?
4. What is Full Wave Rectifier?
5. What is Zener diode? Draw its Symbol?
6. Transistor means ?transfer Resistance?, explain this?
7. Define Transconductance and amplification factor in JFET?
8. Why FET is called voltage controlled device and the BJT called a current controlled device?
9. Compare JFET with BJT?
10. List the merits of IGBT?
PART – B
11. a) Explain the Centre-tapped full-wave rectifier with necessary waveforms and also derive the necessary expressions? ( with and without Filter) (16)
OR
b) i) Explain the working and VI characteristics of Zener diode? (10)
ii) Explain the current equation of a PN diode? Derive the junction Voltage? (6)
12. a) With neat diagram explain the VI characteristics of PN junction diode?(16)
OR
b)
i) Explain in detail about the Laser diode? (8)
ii) Explain the Transition Capacitance and also derive the expressions for CT (8)
13.a)
i) A HWR having resistive load of 1000O , it rectifies an ac voltage of 325V peak value and the diode has a forward resistance of 100O.
Calculate a) peak, average and rms value of current, and b) efficiency? (8)
ii) Explain the operation of a zener diode shunt voltage regulator. (8)
OR
b) With neat diagram explain the Input and Output characteristics of a transistor in CC configuration? List out the comparisons between CE, CB and CC? (16)
14. a) Explain the working of n- channel and p- channel depletion MOSFET. Sketch its typical characteristics. (16)
OR
b) What is UJT? And Explain the working of UJT as a relaxation oscillator with necessary waveforms and equations. (16)
15. a) Explain the construction, principle of operation, characteristics and applications of IGBT? (16)
OR
b) Explain the construction and operation of SCR with neat sketches and characteristics curves. (16)