7/25/2019 I-II - EE105_ELS - Unit-V - Question Bank

1/4

VIGNANS UNIVERSITY :: VADLAMUDI

EE105 Electrical Science

UNIT-V

SEMI CNDUCTR DEVICES

NE MAR! "#e$ti%n$

Mi&-'

1. What is p-type semiconductor?

2. What is n-type semiconductor?

3. Mention any two commonly used semi-conductors?

4. What is doping?

5. What is extrinsic semi-conductor?

6. What is intrinsic semi-conductor?

. What are ma!ority and minority carriers in p- type semi-conductors?

". What are ma!ority and minority carriers in n- type semi-conductors?

#. What is a recti$ier?

1%. What is $orward &iasing o$ a pn diode?

11. What is re'erse &iasing o$ a pn diode?

12. What is depletion region?

13. What is a transistor? What are parts o$ a transistor?

14. What is $orward resistance o$ a diode?

15. What is re'erse resistance o$ a diode?

16. (e$ine )ea* +n'erse ,oltage?

1. What is ripple $actor?

1". What is the sym&ol o$ an ) transistor?

1#. What is the sym&ol o$ a )) transistor?

2%. What is ener diode? What is its main application?

7/25/2019 I-II - EE105_ELS - Unit-V - Question Bank

2/4

T( MAR! "#e$ti%n$

Mi&-'

1. What are the recti$ication e$$iciencies o$ /W0 and W0?

2. ompare the doping le'els o$ parts o$ the transistor.3. ompare the thic*ness o$ the transistor parts.

4. (raw the ,-+ characteristics o$ )- !unction diode and ener diode.

5. he conducti'ity is less $or which materials among conductors semi-conductors and

insulators.

6. What are the ma!ority and minority carriers o$ an ) and )) transistors?

. What is the e$$ect o$ temperature on resistance o$ conductors semi-conductors and

insulators?

". he and ap is more $or which materials anong conductors semi-conductors and

insulators.

#. he resisti'ity is less $or which materials anong conductors semi-conductors and

insulators.

1%. (raw the output wa'e$orms o$ hal$ wa'e and $ull wa'e recti$iers

)IVE MAR! "#e$ti%n$:

Mi&-'

1 7xplain di$$erent energy &ands in the solids also explain conductor insulator and

semiconductors with the help o$ energy &and diagrams.

2 7xplain a&out intrinsic and extrinsic semi conductor. Mention example $or each type o$

semi conductor.

3 7xplain )- !unction diode wor*ing in $orward and re'erse &ias condition and draw ,-+

characteristics o$ )- !unction diode.

4 7xplain wor*ing o$ ener diode wor*ing in $orward and re'erse &ias condition and draw

,-+ characteristics o$ ener diode.

7/25/2019 I-II - EE105_ELS - Unit-V - Question Bank

3/4

5 7xplain the wor*ing o$ ener diode as 'oltage regulator with rele'ant diagrams and

e8uations.

6 7xplain the wor*ing o$ ) transistor with the help o$ rele'ant diagrams.

7xplain the wor*ing o$ )) transistor with the help o$ rele'ant diagrams.

" 7xplain the operation o$ hal$ wa'e recti$ier with the help o$ neat wa'e$orms.

# 7xplain the operation o$ $ull wa'e recti$ier with the help o$ neat wa'e$orms.

1% ompare the per$ormance characteristics o$ hal$ wa'e and $ull wa'e recti$iers.

TEN MAR! "#e$ti%n$:

Mi&-'

1. 7xplain hal$ wa'e recti$iers and s*etch the input and output wa'e $orms deri'e e8uations

$or output (. 'oltage $orm $actor. alculate e$$iciency $or the same hal$ wa'e recti$ier.

2. 9 /W0 circuit is connected to ': 55sin;t and load resistance 0i+m +dc +rms>ii ac power input and dc power output >iii )+, o$ the diode >i' (.

output 'oltage and e$$iciency o$ recti$ication.

3. 7xplain $ull wa'e center tapped and &ridge recti$iers with the rele'ant diagrams also deri'e

e8uations $or output (. 'oltage $orm $actor. alculate e$$iciency $or the same hal$ wa'e

recti$ier.

4. 9 $ull wa'e center tapped recti$ier circuit is connected to ': 55sin;t and load resistance

0i +m +dc +rms>ii ac power input and dc power output >iii )+, o$ the diode

>i'(. output 'oltage and e$$iciency o$ recti$ication.

5. >9 7xplain the wor*ing o$ ener diode as 'oltage regulator with rele'ant diagrams

and e8uations.

> 7xplain wor*ing o$ ener diode wor*ing in $orward and re'erse &ias condition and

draw ,-+ characteristics o$ ener diode.

6. 7xplain wor*ing o$ )- !unction diode and ener diode wor*ing in $orward and re'erse

&ias condition and draw their ,-+ characteristics.

7/25/2019 I-II - EE105_ELS - Unit-V - Question Bank

4/4

. 7xplain the wor*ing o$ ) and )) transistors with the help o$ rele'ant diagrams.

". >9 7xplain a&out intrinsic and extrinsic semi conductor. Mention example $or each

type o$ semi conductor.

> 7xplain wor*ing o$ )- !unction diode wor*ing in $orward and re'erse &ias condition

and draw its ,-+ characteristics.

#. >9 7xplain a&out intrinsic and extrinsic semi conductor. Mention example $or each

type o$ semi conductor.

> 7xplain wor*ing o$ enar diode wor*ing in $orward and re'erse &ias condition and

draw its ,-+ characteristics.

1%. >9 7xplain the wor*ing o$ )) transistor with the help o$ rele'ant diagrams.

> 7xplain the operation o$ $ull wa'e recti$ier with the help o$ neat wa'e$orms