Karnataka State Open University (KSOU) 2011 B.Tech Electrical Engineering- Electronic Device And Circuits - Question Paper
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I. Answer any five only :
1) What happens when PN junction is forward biased ?
2) Derive the efficiency of the full wave rectifier.
3) Whatismeantby thermal run away in transistor ?
4) Why need for Biasing in transistors ? Explain.
5) Define Chopper. Mention the types of chopper.
6) Explain any one application of SCR.
7) Explain why TJJT is used as triggering device.
8) Explain clipper and clamping circuits.
PART-B (5x10=50)
I. Answer any five only :
9) Explain the characteristics of PN Junctiqn diode and derive the equation of barrier.
10) Explain with neat diagram of Bridge Rectifier and derive the efficiency.
the I/O curve, mark the three regions, * - 1
12) Explain with neat diagram and working principle of RC Phase shift Oscillator......-
13) Explain with neat diagram, construction and working principle of TRIAC-
14) Explain with neat diagram, construction and working principle of MOSFET. i 5) Explain with neat diagram, construction and working principle of LCD.
with neat diagram, constractipflMd working principle of Mono stable
Multivibrator. (
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Earning: Approval pending. |