394399
Description
Mind Map by emilywebber98, updated more than 1 year ago
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Created by emilywebber98
over 10 years ago
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Resistance
- Potential Difference
- voltmeter measures the
potential difference
- it is parallel with the
bulb so it measures
the pd across it
- when charge flows steadily through a component
- it is parallel with the
bulb so it measures
the pd across it
- ammeter measures
the current through the
torch bulb
- connected in series with
the bulb so the current
through them is the same
- connected in series with
the bulb so the current
through them is the same
- Reversing current
through a component
reverses the pd
across it
- Potential difference graphs
- a graph that proves ohms law
- a straight line through the
origin means the current
is directly proportional to
the pd
- a straight line through the
origin means the current
is directly proportional to
the pd
- Filament bulb =
resistance increases with
increase of the filament
temperature
- Diode = 'forward'
resistance low;
'reverse'
resistance high.
- Thermistor =
resistance
decreases if its
temperature
increases
- LDR = resistance decreases
if the light intensity on it
increases
- a graph that proves ohms law
- voltmeter measures the
potential difference
- Resistance
- Ohm's law: the current through a
resistor at constant temperature is
directly proportional to the potential
difference across the resistor
- Ohm's law: the current through a
resistor at constant temperature is
directly proportional to the potential
difference across the resistor
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