phsyic p2

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  • Created by: Ronel.p
  • Created on: 09-01-18 00:45
Cell
pushes current around a circuit
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circuit
cell, wire, bulb
2 of 29
current
flow of charge
3 of 29
charge and current equation
q=it
4 of 29
current, resistance and potential difference equation
v=ir
5 of 29
what are i and r in a circuit is
inversely proportional
6 of 29
resistor
anything which can reduce the flow of current in a circuit
7 of 29
i and r are what
directly proportional to each other/ linear realationship
8 of 29
ohms law
the current through a componet is proportional to the pd across it(if temperature remains constant)
9 of 29
does a filament lamp obey ohms law
no
10 of 29
section 1 in graph of a filament lamp
low resistance/ low temperature
11 of 29
section 2 of a filament lamp
high resistance - temperature high
12 of 29
thermistor resitors
resistance decreases as temperature decreases
13 of 29
how are ammeters connected to a circuit
in series
14 of 29
how are voltmeter connected to a circuit
in a parralel
15 of 29
current in a Series
Current is same everywhere
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Current in a parallel
Total current equal to sum of currents through each branch
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potential difference in a series circuit
Total p.d. of power supply shared between components
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potential difference in a parallel circuit
P.d. across each branch is equal
19 of 29
resistance in a series circuit
Total resistance is sum of resistances of each component
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resistance in a parallel circuit
Total resistance is less than resistance of each resistor
21 of 29
Neutral
completes circuit (at or close to 0 V)(blue)
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Earth
– carries current if there is a fault(yellow green)
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live
provides alternating potential (voltage) from power supply(brown)
24 of 29
dc( direct currents
battery
25 of 29
alternating currents
switch
26 of 29
energy transfer in electrical circuits
e=qv
27 of 29
Step-UP transformers
INCREASE voltage
28 of 29
Step-DOWN transformers
DECREASE voltage
29 of 29

Other cards in this set

Card 2

Front

circuit

Back

cell, wire, bulb

Card 3

Front

current

Back

Preview of the front of card 3

Card 4

Front

charge and current equation

Back

Preview of the front of card 4

Card 5

Front

current, resistance and potential difference equation

Back

Preview of the front of card 5
View more cards

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