ohms Flashcards

1
Q

what is the difference between a dry cell and a wet cell

A

a dry cell has a moist paste as its electrolyte and a wet cell has a liquid as its electrolyte

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2
Q

voltemeter

A

measures the amount of potential difference between two locations of charge separation

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3
Q

switch

A

a device that can turn on or off a device

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4
Q

source

A

source of energy

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5
Q

conductor

A

a wire through which electrical current flows

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6
Q

load

A

transforms electric energy into other forms of energy

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7
Q

electric current

A

flow of electricity the flow of charges

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8
Q

unit for current

A

ampers

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9
Q

voltage

A

electrical potencial difference

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10
Q

relationship between v and I

A

current is directly proportional to voltage

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11
Q

ohms law

A

the mathematical relationship between voltage current and resistance

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12
Q

voltage symbol

A

V

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13
Q

resistance symbol

A

R

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14
Q

curent symbool

A

A I

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15
Q

black

A

0

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16
Q

brown

A

1

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17
Q

red

A

2

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18
Q

orange

A

3

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19
Q

yellow

A

4

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20
Q

green

A

5

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21
Q

blue

A

6

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22
Q

violet

A

7

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23
Q

grey

24
Q

white

25
gold
%5
26
silver
%10
27
resistance
the property of any material that slows the down the flow of electrons and converts into other forms of energy
28
if u decrease the amount of charge
you decrease the electric force
29
if u increase the distance between charged objects
you decrease the electric force
30
if u decrease the distance between charged objects
you increase the electric force
31
contact forces
when the object touches attracts
32
action at a distance forces
when they object doesn't tough repel
33
force
push or pull of a object
34
electrodes
two terminals that a battery has
35
electrolytes
the electrodes, its a substance that conducts electricity
36
unit for measuring electric current
ampre ( A)
37
what does a ammeter do
measures current
38
electrical resistance
the ratio of voltage to the current
39
ohm
unit of measurement for electrical resistance
40
examples of electrical energy
friction, generators
41
electrochemical cell
converts chemical energy into electric energy
42
what happens when unlike charges move farther apart
they gain electric potential energy
43
what is a insulator
materials that do not allow charges to move easily, electrons removed are not replaced by a new location
44
examples of insulators
glass, plastics, ceramics dry wood
45
what are conductors
materials that allow charges to move freely, charged acatate that touches the end of the metal rod spreads the excess amount of electrons evenly on the rod
46
examples of conductors
metals, Copper, aluminum
47
static charge
also known as static electricity, electric charges that can be collected and held in one place
48
acatate
type of plastic used in photoagphic film and over head transparencies
49
grounding
allowing charge to flow into the earths surface
50
van de graaf generator
generates high voltage, a lake static charge on a metal dome,
51
Coulumb
unit of electric charge
52
electroscope
measures electricity, detects electricity
53
if u increase the voltage
the current will also increase
54
milli m
one thousand
55
kilo k
one thousand
56
mega M
one million
57
laws of static charge
like charges repel unlike chareges attract neutral objects are attracted to charged objects