I–V Graphs (AQA GCSE Physics Combined Science): Flashcards
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Practise the cards
14 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)
Unit of potential difference ()
Unit of potential difference ()
Volts (V)
Unit of current ()
Unit of current ()
Amps (A)
Ohmic resistor proportionality
Ohmic resistor proportionality
Current and potential difference are directly proportional
I-V graph shape for ohmic resistor
I-V graph shape for ohmic resistor
Straight line through the origin
Why non-ohmic resistance changes
Why non-ohmic resistance changes
Wire heats up, metal atoms vibrate, increasing resistance
Diode current flow direction
Diode current flow direction
One direction only
Voltage needed for diode to conduct
Voltage needed for diode to conduct
Threshold voltage
Diode resistance in reverse direction
Diode resistance in reverse direction
Very high for all potential differences
Diode behavior above threshold voltage
Diode behavior above threshold voltage
Resistance drops rapidly, current increases rapidly