DC Electrical Ckts

Question 1

Solid piece of semicon material

Answer 1

Solid state devices

Question 2

<4ve-

Answer 2

Conductor

Question 3

> 4ve-

Answer 3

Insulator

Question 4

=4ve-

Answer 4

Semicon

Question 5

How many electrons are there in the valence orbit of a silicon atom within a crystal?

Answer 5

8

Question 6

Non metal & metal

Answer 6

Ionic bonding

Question 7

2 metals

Answer 7

Metallic

Question 8

2 non-metals

Answer 8

Covalent

Question 9

Conventional flow

Answer 9

Positive to negative

Question 10

Electron flow (actual flow)

Answer 10

Negative to positive

Question 11

Process of adding impurities or dopands

Answer 11

Doping

Question 12

Increases conductivity

Answer 12

Doping

Question 13

Doping of a semiconductor means

Answer 13

That impurities are added to decrease the resistance of the material

Question 14

2 types of semicon materials

Answer 14

Intrinsic
Extrinsic

Question 15

Pure semicon

Answer 15

Intrinsic

Question 16

Doped semicon

Answer 16

Extrinsic

Question 17

Types of extrinsic

Answer 17

N-type
P-type

Question 18

Donor atoms

Answer 18

N-type

Question 19

Acceptor atoms

Answer 19

P-type

Question 20

Trivalent atoms

Answer 20

P-type

Question 21

Trivalent atoms

Answer 21

P-type

Question 22

Pentavalent atoms

Answer 22

N-type

Question 23

Phosphorus
Antimony
Arsenic
Bismuth

Answer 23

N-type materials

Question 24

Gallium
Aluminum
Boron
Indium

Answer 24

P-type

Question 25

Majority and minority carrier of N-type

Answer 25

Electrons Hole

Question 26

Majority and minority carriers of P-type

Answer 26

Holes Electrons

Question 27

Which of the following describes an N-type semicon? Neutral Positively charged Negatively charged Has many holes

Answer 27

Neutral

Question 28

Holes in an n-type semicon are:

Answer 28

Minority carriers that are thermally produced

Question 29

Carriers that are produced by doping

Answer 29

Majority

Question 30

Carriers that are produced by heat

Answer 30

Minority

Question 31

The current in a semiconductor is produced by

Answer 31

Both electrons and holes

Question 32

Directions of semiconductor diode

Answer 32

Unilateral / unidirectional

Question 33

Refers to the use of dc voltage to establish certain opertaing condition for an electronic device

Answer 33

Diode biasing

Question 34

Biasing of Si

Answer 34

0.7V

Question 35

Ge

Answer 35

0.3V

Question 36

GaAs

Answer 36

1.2V

Question 37

When the diode current is large, the bias is

Answer 37

Forward

Question 38

There is a small amount of current across the barrier of a reverse biased diode. This current is called:

Answer 38

Reverse leakage current / saturation

Question 39

What kind of a device is a diode? Bilateral Passive Nonlinear Unipolar

Answer 39

Nonlinear

Question 40

The ideal diode is usually adequate when:

Answer 40

Troubleshooting

Question 41

Diode that operates in reverse-breakdown

Answer 41

Zener

Question 42

Silicon PN junction Used for voltage references, regulator, limiters

Answer 42

Zener

Question 43

Variable capacitor

Answer 43

Varactor

Question 44

Operation of varactor

Answer 44

Reverse bias

Question 45

Diode that doped to maximize inherent cap depletion region

Answer 45

Varactor

Question 46

Electrolumiscence

Answer 46

Light-emitting diode

Question 47

Operations of light-emitting diode

Answer 47

Forward bias

Question 48

Operates in reverse bias When PN junction is exposed to light, the reverse current increases with the light intensity

Answer 48

Photodiode

Question 49

High current diodes

Answer 49

Schottky diode

Question 50

"Hot carrier diode"

Answer 50

Schottky

Question 51

Used primarily in high-freq and fast-switching applications

Answer 51

Schottky

Question 52

"Esaki diode"

Answer 52

Tunnel diode

Question 53

Has a characteristic of negative resistance

Answer 53

Tunnel diode

Question 54

Diode that is useful in oscillatkr and microwave amplifier applications

Answer 54

Tunnel diode

Question 55

Diode consisting of heavily doped P and N regions separated by an intrinsic (I) region

Answer 55

PIN Diode

Question 56

A diode that is approx constant

Answer 56

Zener

Question 57

When the reverse voltage increases, the capacitance ____

Answer 57

Decreases

Question 58

Which capacitance dominates in the forward-bias region? Diffusion Transition Depletion None of these

Answer 58

Diffusion

Question 59

Range of operating voltage level for LEDs

Answer 59

1.7-3.3 V

Question 60

Photodiode is normally _____

Answer 60

Reverse-biased

Question 61

When the ligjt increases? The reverse minority carrier current in a photodiode ____

Answer 61

Increases