Resistors (AQA GCSE Physics Combined Science): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
What do I-V graphs show?
What do I-V graphs show?
How current changes when potential difference is altered
Axis for current () on I-V graph
Axis for current () on I-V graph
Vertical y-axis
Axis for potential difference () on I-V graph
Axis for potential difference () on I-V graph
Horizontal x-axis
Fixed resistor resistance characteristic
Fixed resistor resistance characteristic
Constant (doesn't change)
I-V graph shape for fixed resistor
I-V graph shape for fixed resistor
Straight line through the origin
Relationship type for fixed resistor I-V graph
Relationship type for fixed resistor I-V graph
Linear relationship
What happens to filament lamp as current increases
What happens to filament lamp as current increases
Filament gets hotter and vibrates more, resistance increases
I-V graph shape for filament lamp
I-V graph shape for filament lamp
Curved line that gets less steep (non-linear)
Direction current flows in a diode
Direction current flows in a diode
One direction only (forward direction)
Threshold voltage for silicon diode
Threshold voltage for silicon diode
Around 0.7V
I-V graph shape for diode
I-V graph shape for diode
Flat then straight line
Purpose of variable resistor in I-V circuit
Purpose of variable resistor in I-V circuit
To change the potential difference
Steeper gradient on I-V graph means
Steeper gradient on I-V graph means
Lower resistance
Formula to find resistance from I-V graph
Formula to find resistance from I-V graph
Component with curved I-V line getting less steep
Component with curved I-V line getting less steep
Filament lamp