Resistors (AQA GCSE Physics): Flashcards
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Practise the cards
15 cards from this deck
What I-V graphs show
What I-V graphs show
Relationship between current and potential difference
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
I-V graph shape for fixed resistor
I-V graph shape for fixed resistor
Straight line through origin
What are ohmic conductors?
What are ohmic conductors?
Components showing linear relationship between V and I
I-V graph shape for filament lamp
I-V graph shape for filament lamp
Curved line
Effect of higher temp. on filament lamp resistance
Effect of higher temp. on filament lamp resistance
Higher resistance
I-V graph shape for diode
I-V graph shape for diode
Flat then steep line
Direction current flows in diode
Direction current flows in diode
One direction only
What diode needs before current flows
What diode needs before current flows
Threshold voltage
Equipment to measure current
Equipment to measure current
Ammeter
Equipment to measure potential difference
Equipment to measure potential difference
Voltmeter
Formula for resistance
Formula for resistance
Is gradient of I-V graph the resistance?
Is gradient of I-V graph the resistance?
No, must divide voltage by current
How to find resistance from I-V graph
How to find resistance from I-V graph
Divide voltage by current at chosen point