Question Papers & Solutions

EXAM/ECE/CSE/IT/EEE/0664/Dec 2018

Basic Electronics Diploma Paper EEE/ECE/CSE/Dec 2018                                


Q1. Do as directed.                                                                                                     15×1=15

      1.The value of knee voltage of a Germanium diode is 0.3 Volt.

      2.The electrons in the outermost orbit are called Valence Electron

      3. Holes are Majority carriers in the p-type

      4.MOSFET is a  Voltage Controlled Device

      5.A Zener diode is always operated in Zener Breakdown Region.

      6.When pn junction is heavily doped, its breakdown voltage will Decrease.

      7.FET is Uni Polar Device

     8.The smaller the stability factor, the Higher will be the thermal stability of                the Circuit ?

     9.If the arrow points outward, the transistor is an NPN Transister.

    10.The best biasing method is achieved by adopting Voltage Divider Biasing.

    11.BJT stands for Bipolar Junction Transister

    12.CMOS stands for Complementary Metal Oxide Semiconductor. 

    13.Current amplification factor of CB is Ic/Ie .

    14.The meaning of hybrid is Intermixing of Two or More Parameter .

    15.Output signal frequency of full wave rectifier is Double of input signal .


Q2. Attempt any five questions.                                                 5×6=30

       1.Explain the need for Stabilization of the Operating Points ?

     2.Discuss the advantages of FET over Conventional Transister.

     3.Explain the effect of temperature on conductivity of intrinsic Semiconductor.

     4.Write a note on tunnel Diode ?

     5.Draw Circuit of Half Wave Rectifier and Explain its working. Draw the                      output Waveform ?

    6.What do you mean by thermal runaway?

    7.Draw and explain Filter Circuits ?

    8.What is Zener Diode? Explain its Applications ?


Q3. Attempt any three questions.                                                            3×10=30

   1.Draw and Explain the Common Emitter Configurations of a Transister ?

   2.Explain construction and working principle of FET. Draw the neat diagram ?

   3.Write note on PN Junction and its biasing. Difference between the n-type and         p-type semiconductor.

   4.Explain in Detail Different Types of Biasing ?

   5.Write short notes on the following. (any two)

         1. LED

         II.Avalanche breakdown

         III.Schottky Diode


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Section a FILL IN THE BLANKS basic electronics be dec 218 paper

Which Impurity is added to Pure Semiconductor to Form N-type semiconductors

Pentavalent Impurity

What is The Efficiency of Half Wave Rectifier


Which Transformer used in Full Wave Rectifier

Center-Tap transformer 

Filter circuits are used to reduce

ac component

The value of knee voltage for silicon diode is

Knee Voltage of Silicon diode is 0.7V

Zener diode is made to operate in _______ Region

Zener Breakdown Region

In BJT, leakage current mainly depends on ___________.


AC load line of a transistor is steeper than its D.C. load line. (T/F)


The Best Biasing Method is achieved by adopting _______________________.

Potential Divider or Voltage Divider Biasing.

JFET stands for ______________________________.

Junction Field Effect Transistor

MOSFET is a _____________________ Controlled device

Voltage Controlled device.

The emitter and collector regions of BJT is ___________ Doped  and _____________ Doped

Emitter is Highly Doped and Collector is Moderate Doped.

Free Electrons Exists in _____________ Band.

Valence Band

When both the junctions of a transistor are forward biased, it is said to be in _______________ Region

Saturation Region

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Section B : Basic electronics dec 2018 PAPER

Explain Intrinsic and Extrinsic Semiconductor with Suitable Diagram ?

Intrinsic and Extrinsic Semiconductor Click Here.

What is Zener diode? Draw its symbol and explain its characteristics.

What is Zener diode? Draw its symbol and characteristics 

Explain the Working of Half Wave Rectifier

Working of Half wave Rectifier click here

Explain the working of NPN Transistor ?

Working of NPN Transistor Click Here

Difference Between FET and BJT ?
h-Parameters (hybrid Parameter) of transistors ?

hybrid Parameter) of transistor

In what way the temperature variations affect the operating point of a transistor?

Temperature variations affect the operating point of a transistor 

Explain the Phase reversal of output voltage with respect to input voltage in an Amplifier ?

Phase reversal of output voltage with respect to input voltage in an Amplifier 

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Section c solved basic electronics dec 2018 paper

Explain conductors, insulators and semiconductors on the Basis of their Energy Band Theory ?

Energy Band Theory Click Here

Explain Construction Working of Full Wave Bridge Rectifier ?

Full Wave Bridge Rectifier Click Here

Explain PN Junction and draw the V-I characteristics of PN Junction ?

 PN Junction Click Here

Input and Output Characteristics of CE configuration of a Transistor ?

CE configuration of a Transistor Click Here

Write Short Note on Light Emitting Diode ?

Light Emitting Diode

Define Drift and Diffusion current

Drift and Diffusion current

Filter Circuit 

Filter Circuit 

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