Electronics-I Question Paper of 3rd Semester Electrical(D) Download Previous Years Question Paper 2

S.B. Roll No……

ELECTRONICS-I

3^rd Exam/Elect/5207/Dec’07

Duration 3 Hrs.

Section –A

1.                 Fill in the blanks

a.                 A Germanium atom contains _______ valance electrons.

b.                 In N-type semi conductor, the current conduction is by _________

c.                  Base terminal is used to control the ___________ form collector to emitter.

d.                 JFET has _____________ noise figure.

e.                  Three terminals of JFET are ______

f.                   For an amplifier ________ coupling gives highest gain.

g.                 ___________ transistor configuration ha highest input impedance.

h.                 The base of ancestor is very __________ and ___________ doped

i.                   ____________ configuration has lowest voltage gain

j.                   A FET has _________ input impedence.

Section –B

 Note: Attempt any six questions

2.                  

a.                 Discuss full wave rectifier with diagram.

b.                 Compare silicon and germanium for conductivity.

c.                  Give characteristics and applications of FET.

d.                 Explain the need of biasing for transistor.

e.                  .  what is Zener diode? Explain Zener diode as regulator.

f.                   What is the use of filter circuits? Discuss different types of filters.

g.                 Explain the conversion of voltage source to current source.

h.                 Discuss JFET as an amplifier.

Section –C

3.  Discuss transformer coupled amplifier with suitable diagrams and frequency response.

4.  Discuss single stage and multistage transistor amplifiers.

5. What is diode? Explain different types of diodes with applications.

6.   Discuss energy band structure for insulators, semiconductor and conductor.

7.   Explain constant current source and constant voltage source with their graphical representations.