4679945
Description
Mind Map by Lilac Potato, updated more than 1 year ago
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Created by Lilac Potato
almost 9 years ago
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GCSE AQA Physics 2 Circuits
- Current, resistance
potential difference
- Current - flow of
electric charge around
the circuit, units: amps
- Ammeter - in series
- Ammeter - in series
- Potential difference - driving
force that pushes the current
round, units: volts
- Voltmeter - in parallel
- Voltmeter - in parallel
- Resistance: anything which slows
the flow down, units: ohms
- Increases with temp. - ions in conductor move more, can't flow easily
- Increases with temp. - ions in conductor move more, can't flow easily
- The greater the resistance,
the smaller the current
- Current = Charge (C) / Time (s)
- Charge is measured
in coulombs
- Charge is measured
in coulombs
- Potential difference =
Work done (J) / Charge (C)
- Current - flow of
electric charge around
the circuit, units: amps
- Circuit Symbols
- Cell
- Battery
- Open switch
- Closed switch
- Lamp
- Fuse
- LED
- Resistor
- Variable Resistor
- Ammeter
- Voltmeter
- Diode
- LDR
- Thermistor
- Cell
- Potential difference-current graphs
- Resistor - current is
directly proportional to PD
- Filament lamp - as temp. increases, resistance increases
- Diode - current will only
flow in one direction, high
resistance in opposite
- V = IR
- Resistor - current is
directly proportional to PD
- Circuit devices
- LED - emits light when
flowing in forward direction
- LDR - LURD (Light Up, Resistance Down)
- Thermistor - TURD (Temp.
Up, Resistance Down)
- LED - emits light when
flowing in forward direction
- Series Circuits
- Remove 1 component - broken
- PD is shared
- Current is the same
- Resistance adds up
- Cell voltages add up
- Remove 1 component - broken
- Parallel Circuits
- Each component separately connected
- Removing - won't affect
- Removing - won't affect
- PD is the same
- Current is shared
- Each component separately connected
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