MOD 4 cheat

Question 1

Ohmmeter

Answer 1

used to test Semiconductors

Question 2

A PNP Transistor

Answer 2

The Arrow of the emitter points in

Question 3

Advantages of Full wave rectifier

Answer 3

all of the wave used

Question 4

Semiconductors made from

Answer 4

silicone and germanium

Question 5

Extrinsic Semiconductors

Answer 5

Doping - Adding Impurities

Question 6

Rectifier to convert Positive and Negative cycles

Answer 6

Full wave rectifier

Question 7

N type material doped with

Answer 7

Pentavalent Material (Penta-Five)

Question 8

Majority Carriers N - type material

Answer 8

Electrons

Question 9

P-Type material doped with

Answer 9

Trivalent Material - (Tri-3)

Question 10

Bridge rectifier

Answer 10

Utilises the full wave of input voltage

Question 11

Operational Amplifiers

Answer 11

Negative Feedback

Question 12

To check a Diode

Answer 12

Remove from circuit

Question 13

Relay coil diode

Answer 13

Flywheel

Question 14

Opto-coupler has

Answer 14

LED and Photo diode

Question 15

Varistor

Answer 15

Voltage too high, Resistor breaks down and conducts

Question 16

NPN transistor biased

Answer 16

Negative connected to emitter

Question 17

FET type

Answer 17

Unipolar

Question 18

Switch off Thyristor

Answer 18

Reduce Anode/Cathode volts to zero

Question 19

Varactor Diode

Answer 19

Reverse bias, depletion layer acts as a capacitor

Question 20

Diode to regulate current

Answer 20

Require a resistor in series

Question 21

Max current Zener Diode 15V 1W

Answer 21

66mAmps

Question 22

2 Silicon Diodes in series

Answer 22

Voltage drop 1.2V

Question 23

LED emits light

Answer 23

Holes and electrons recombine

Question 24

Zener Diode

Answer 24

Voltage regulation

Question 25

Positive voltage on P material of Diode

Answer 25

Forward biased

Question 26

Transistor, temperature increases

Answer 26

base to emitter decreases

Question 27

PNP VBE .7v & VCB .5V

Answer 27

transistor saturated

Question 28

Switch off SCR

Answer 28

remove voltage from Anode/cathode

Question 29

Switch SCR off

Answer 29

Current falls below holding value

Question 30

Switch SCR off

Answer 30

Reverse Biased Positive to Cathode / Negative to Anode

Question 31

An amplifier changes

Answer 31

Small Frequency to high frequency

Question 32

Transistor to conduct

Answer 32

Emitter / Bias forward bias Collector/ Base reverse bias

Question 33

Bipolar transistor called

Answer 33

two PN junctions

Question 34

FET

Answer 34

uses less power

Question 35

IC compared to a transistor

Answer 35

Consumes less power

Question 36

Emitter current

Answer 36

equals base plus collector

Question 37

Operational Amplifier has

Answer 37

very high input impedance

Question 38

Op-amp volt gain

Answer 38

feedback resistor over input resistor - minus 180 degree

Question 39

Op-Amp input impedance

Answer 39

high

Question 40

Op-amp normal operation

Answer 40

requires feedback

Question 41

Op amp has

Answer 41

infinite gain

Question 42

Two types of ICs

Answer 42

Linear and digital

Question 43

Two types of linear ICs used

Answer 43

operational amp and voltage reg

Question 44

Static effects

Answer 44

FETs

Question 45

Res/cap on Emitter

Answer 45

Temp stab and decoupling

Question 46

Base / Emitter voltage small change with large on Collector / Emitter

Answer 46

Amplifier

Question 47

Emitter / Base fwd biased, Collector/Base reverse Bias

Answer 47

Current flow

Question 48

Bipolar classified

Answer 48

NPN and PNP

Question 49

Astrable

Answer 49

Self- Oscillating

Question 50

Transistor low fwd and reverse resistance Base/Emitter

Answer 50

Shorted Base / Emitter

Question 51

Common Emitter

Answer 51

High power gain, 180 shift, Medium Voltage

Question 52

Differential Amplifier gain 10 5mV invert, 25mV non invert

Answer 52

200mV

Question 53

Inverting amp 1k input feedback 4k

Answer 53

gain -4

Question 54

Differential Amp non inverting increasing, invert same

Answer 54

output more positive increasing

Question 55

2 Types of ICs circuits

Answer 55

Linear and digital

Question 56

Linear circuit output

Answer 56

proportional to input

Question 57

Op-Amp, zero-volt output

Answer 57

offset voltage adjust

Question 58

Op-amps cannot do

Answer 58

binary operation

Question 59

Op-amps have

Answer 59

High impedance input, Low output

Question 60

Soldering used on a PCB - type

Answer 60

Hand and Mass soldering

Question 61

PCB etching

Answer 61

Ferric chloride

Question 62

Multi layer PCB

Answer 62

plated through holes

Question 63

AND gate

Answer 63

Requires 2 high inputs to give high output

Question 64

OR gate

Answer 64

requires 1 High input to give High output

Question 65

Synchro Rotor Power supply

Answer 65

26V AV 400Hz

Question 66

To prevent Servo Overshoot

Answer 66

Velocity Feedback

Question 67

Servo can be

Answer 67

AC or DC

Question 68

Rotor of Desynn RX

Answer 68

Permanent magnet

Question 69

Power supply to Torque Synchro

Answer 69

26 volt AC

Question 70

Servo is

Answer 70

Force amp

Question 71

Diff Transmitter synchro has

Answer 71

3 stator and 3 rotor windings

Question 72

Synchro swap 2 stator leads

Answer 72

Opposite direction

Question 73

Power supply to torque to torque synchro system

Answer 73

Rotor TX and RX

Question 74

Deadband

Answer 74

I/P change no output change

Question 75

Diff Transmitter synchro used for

Answer 75

Addition and Subtraction

Question 76

Close loop

Answer 76

Feedback

Question 77

Identify a circuit diagram

Answer 77

Full wave diode bridge rectifier

Question 78

FET Gate controlled by

Answer 78

Voltage

Question 79

Types of FETs

Answer 79

Junction and MOS

Question 80

OP-Amp gain

Answer 80

Very high gain - infinity

Question 81

Inverting Op-Amp output

Answer 81

180 degree shift

Question 82

Resolvers converts voltages

Answer 82

Between Cartesian and Polar vice versa

Question 83

Resolution means convert from

Answer 83

Polar to Cartesian

Question 84

Resolvers have

Answer 84

2 Rotor windings and 2 stator windings

Question 85

Resolution what winding is shorted

Answer 85

One stator

Question 86

Logic circuits Types

Answer 86

TTL and CMOS

Question 87

PCB made from what material

Answer 87

Thinn flexible insulator (polyester, Epoxy glass cloth)

Question 88

Very Large Scale Integration VLSI

Answer 88

Over 1000 Gates