the electronic stytem Flashcards

1
Q

what does force mean

A

The force that makes electrons flow in a conductor is called voltage symbol and is measures in volts.

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2
Q

what is meant by current

A

An electric current is a flow of electrons when we measure current in a circuit we are measuring the number of electrons passing a given point in a second current

measure in amps

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3
Q

what is the symbol, measurement, symbol of the measurement of voltage

A

v, volts , v

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4
Q

what is the symbol, measurement, symbol of the measurement of current

A

I, amps, A

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5
Q

what is the symbol, measurement, symbol of the measurement of residence

A

R ohms, horse shoe symbol

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6
Q

what is mega-M

A

millions

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7
Q

what is Base-unit

A

the standard units of measurement

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8
Q

what is kilo-k

A

thousands

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9
Q

what is mili-measure the resistance

A

millions

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10
Q

what is a resistor

A

-to accurately measure the resistance of a component
-remove from the circuit
-and measured using standard multimeter

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11
Q

what are electricity conductors

A

materials that are suitable for carrying electrical current

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12
Q

electricity insulaters

A

materials that prevent electrical flow

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13
Q

semi conductors materials

A

displays both conductive and insulated properties

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14
Q

examples of conductors

A

graphite
gold
copper #

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15
Q

example of insulators

A

plastic
wood
rubber

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16
Q

examples of semi conductors

A

silicon germanium

17
Q

what is the input

A

the input senses and reacts to specific changes

18
Q

what is the process

A

the control reacts to change in the imput and then controls or changes the output

19
Q

what is the output

A

it switches on or off by the control parts of the circuit

20
Q

what does the battery do in a circut

A

acts as a source power for the electronical circuit

21
Q

what does a thiristor do

A

as temperature rises the resistors of the thermistor increases and the temperature falls the resistant decreases

22
Q

what does a variable resistor do `

A

increases or decreases the amount of resistance to flow of electrons

23
Q

what does the LDR do

A

A piece of semi conduct material that has a low resistance in the light conditions and high resistance when is dark

24
Q

what is a diode

A

is a piece of semi conductive material that only allows current to flow in one direction

25
Q

what is a resistor

A

resistor protects components against voltage spikes components that are sensitive to high electronic current such as LEDS

26
Q

!!!!!!!! learn signs in the book !!!!!!!!!!

A
27
Q

how do you design a pvc board

A

-design PCB layout
-use a UV light box to transfer the layout
-develop layout using sodium -hydroxide/developer/ 30 seconds
-rince with water
-drill holes using PCB drill

28
Q

what are the safety precaution for a PCB board

A

ruber golves
dont look at the UV light
if any acid gets on you skin seek medical attention
PCB drill—-> hair tied back safety googles wear an apron

29
Q

how to mark a PCB with a router

A

design layout
load layout into a solution
put board in machine —>router
router cuts engraves the layout + holes