I–V Graphs and Resistors (AQA GCSE Physics): Flashcards
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Practise the cards
12 cards from this deck
Y-axis of I-V graph
Y-axis of I-V graph
Current
X-axis of I-V graph
X-axis of I-V graph
Potential difference
Gradient of I-V graph represents
Gradient of I-V graph represents
Resistance
Formula for resistance
Formula for resistance
Unit of resistance
Unit of resistance
Ohms (Ω)
Characteristic of ohmic resistor
Characteristic of ohmic resistor
Current and p.d. are directly proportional
I-V graph shape for ohmic resistor
I-V graph shape for ohmic resistor
Straight line through origin
Non-ohmic resistor definition
Non-ohmic resistor definition
Resistance changes with current
Why non-ohmic resistance changes
Why non-ohmic resistance changes
Wire gets hot and metal atoms vibrate
Current flow direction in diodes
Current flow direction in diodes
One direction only
Diode conduction requirement
Diode conduction requirement
Above threshold voltage
Diode behaviour above threshold voltage
Diode behaviour above threshold voltage
Resistance drops, current increases rapidly