3861569
Description
Mind Map by Francesca Weiner, updated more than 1 year ago
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Created by Francesca Weiner
about 9 years ago
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Physics- Electricity
- Resistance
- Whatever
opposes
the flow
of charge.
Measured
in ohms
- Resistance+
Current
around
circuit -
- Length of
wire- longer
wire means
more
resistance
- thickness-
thicker
wire
means
more
resistance
- Material
- Whatever
opposes
the flow
of charge.
Measured
in ohms
- Potential Difference
- Sometimes called
voltage, as it is
measured in Volts
(V) ,with a voltmeter
- The p.d across a
cell is called the
electromotive force
(emf). It tells us how
strong a cell is.
- P.d Problems
- Sum of p.d
across a cell
in series
must equal
sum of p.d
across other
components
in the loop
- V1=V2+V3
- V1=V2+V3
- Sum of p.d in
branch of
parallel circuit
equals sum of
p.d across any
other parallel
branch
- V1=V2=V3
- V1=V2=V3
- Sum of p.d
across a cell
in series
must equal
sum of p.d
across other
components
in the loop
- Sometimes called
voltage, as it is
measured in Volts
(V) ,with a voltmeter
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