Systems Components flashcards

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122 Terms

1

Cell

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2

Battery/ SC power supply

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3

Variable DC power supply

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4

Purpose of Variable DC power supply

Easily adjust the output voltage and somtimes the current

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5

AC power supply

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6

Purpose of AC power supply

Supplies alternating currant to an electronic device

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7

Resistor

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8

Purpose of a resistor

Limits or regulates the flow of electrical current in an electronic circuit

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9

variable resistor,

potentiometer,

voltage divide

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10

Purpose of a potentiometer

Measure the unknown voltage by comparing it with a known voltage

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11

Purpose of a voltage divider

Scale down very high voltages so that it can be measured by a volt meter

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12

variable resistor

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13

Purpose of a variable resistor

Adjust the value of current or voltage

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14

light-dependent resistor (LDR)

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15

Purpose of a Light dependent resistor

Indicate the presence or absence of light, or to measure the lights intensity

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16

filament globe

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17

Thermistor

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18

Purpose of the thermistor

Changed resistance as temperature changes

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19

Fuse

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20

Purpose of a fuse

Melts with too much current flows through, protects the circuit from too much current

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21

(non-polarised) capacitor

Pass AC and block DC IN A SERIES CIRCUITA, filters power supplies

<p>Pass AC and block DC IN A SERIES CIRCUITA, filters power supplies </p>
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22

variable capacitor

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23

Purpose of a variable capacitor

To allows for change in capacitance, set a resonance frequency

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24

polarised capacitor,

electrolytic capacitor

Filter power supplies

<p>Filter power supplies </p>
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25

iron-cored transformer

(one secondary winding)

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26

iron-cored transformer

(one secondary winding –

centre-tapped)

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27

iron-cored transformer

(two secondary windings)

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28

Purpose of Transformer

Transfer electric energy from one alternating current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage

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29

junction diode

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30

Purpose of junction diode

also known as a PN junction it allows current to flow more easily in one direction than another

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31

Zener diode

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32

Purpose of a Zener diode

Voltage references or to regulate the voltage across small circuits

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33

photo diode

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34

Purpose of a photo diode

The exact measurements of the intensity of light in science and industry, faster and more complex than normal PN junction diodes

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35

light-emitting diode (LED)

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36

diode bridge

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37

purpose of a diode bridge

Rectifying an alternating current into a direct current or pulsating current

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38

npn transistor

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39

Purpose of NPN transistor

Amplifies weak signals that enter into the base and produces strong signals at the collectors end

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40

pnp transistor

Increase voltage or current of signals, can be used as a switch

<p>Increase voltage or current of signals, can be used as a switch</p>
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41

What is the difference between PNP and NPN transistor

PNP have a lower turn on voltage NPN have higher current carrying capacity

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42

n-type junction field effect transistor (NJFET)

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43

purpose of n-type junction field effect transistor (NJFET)

Switches and Amplifiers

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44

p-type junction field effect transistor (PJFET)

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45

Purpose of p-type junction field effect transistor (PJFET)

Switches and Amplifies 2

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46

integrated circuit (IC)

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47

What kinds of Integrated circuits are there

Amplifier, timer, counter, logic gates, computer memory, micro controller and processor

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48

single pole, single throw (SPST) switch

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49

Purpose of single pole, single throw (SPST) switch

Basic ON/OFF function

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50

single pole, double throw (SPDT) switch

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51

Purpose of single pole, double throw (SPDT) switch

Connects a single line conductor to either of 2 possibilities

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52

double pole, single throw (DPST) switch

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53

Purpose of double pole, single throw (DPST) switch

Connect 2 source terminals to their respective output terminals (NEVER TO EACH OTHER)

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54

double pole, double throw (DPDT) switch

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55

Purpose of double pole, double throw (DPDT) switch

Connect 2 independent signals to two possibilites in tandem

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56

normally open

(NO) switch

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57

Purpose of a normally open switch

Allows no current to flow unless altered

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58

normally closed (NC) switch

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59

Purpose of normally closed switch

Allows current to flow until altered

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60

Relay

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61

Purpose of a relay

Control one circuit by opening and closing contacts in another circuit

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62

Ammeter

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63

Purpose of ammeter

Measure amps (current)

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64

Voltmeter

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65

Purpose of voltmeter

Measure volts

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66

Galvanometer

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67

Purpose of a Gavanometer

Measure the direction and intensity of electrical current

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68

cathode ray oscilloscope (CRO)

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69

Purpose of a cathode ray oscilloscope (CRO)

Displaying measuring and analyzing waveforms (DC or AC) and other electrical phenomena

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70

voltage amplifier

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71

Purpose of a voltage amplifier

Accept input voltage and produce an accurate replica of this voltage as an output voltage

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72

operational amplifier (op amp)

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73

Purpose of a operational amplifier (op amp)

Amplify and output the voltage difference between two input pins

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74

Motor

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75

Microphone

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76

Loudspeaker

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77

NOT gate or inverter

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78

Purpose of a NOT gate

Inverts the input signal eg. 1 = 0

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79

OR gate

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80

Purpose of an OR gate

Will produce an on signal is at least one pin is on

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81

XOR (exclusive OR) Gate

The inputs must be different to produce an ON signal

<p>The inputs must be different to produce an ON signal </p>
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82

NOR Gate

If at least one pin is ON it will produce an OFF signal

<p>If at least one pin is ON it will produce an OFF signal </p>
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83

AND Gate

A ON signal will only be produced is both of the pins are ON

<p>A ON signal will only be produced is both of the pins are ON </p>
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84

NAND Gate

A OFF signal will only be produced if both pins are ON

<p>A OFF signal will only be produced if both pins are ON</p>
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85

T (toggle) flip-flop

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86

Purpose of a T (toggle) flip-flop

Changes or toggles its output based in the input state

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87

Earth

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88

Aerial

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89

What is an Aerial

Antenna

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90

non-connected leads

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91

connected leads

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92

dot for junction of connected leads

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93

Watts =

volts X Amps

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94

What is a analogue signal

It is a continuous signal with constant fluctuations

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95

What is a digital signal

A signal with only two voltages 1 and 0, which is high and low respectively

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96

What does variable mean

A factor or condition which can be measured, altered or controlled

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97

What type of motion is used in resonance

oscillation

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98

what is the difference between Non and polarized capacitors

Capacity how much voltage they can store, Non-Polarized capacitors can run much higher frequencies

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99

What is resonance

A phenomenon that occurs when objects match the vibrations of another object increases the amplitude of an objects oscillations

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100

What are the 4 forces

Compression, Tension, Shear, Torsion, bending

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