I–V Graphs and Resistors (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Practise the cards
14 cards from this deck
Y-axis on I-V graph
Y-axis on I-V graph
Current
X-axis on I-V graph
X-axis on I-V graph
Potential difference
Gradient of I-V graph represents
Gradient of I-V graph represents
Resistance
Formula for resistance
Formula for resistance
Ohmic resistor I-V graph shape
Ohmic resistor I-V graph shape
Straight line through origin
Non-ohmic resistors
Non-ohmic resistors
Resistance changes with current
Why non-ohmic resistance increases
Why non-ohmic resistance increases
Wire heats, metal atoms vibrate
Diodes current flow direction
Diodes current flow direction
One direction only
Diode requirement to allow current
Diode requirement to allow current
Threshold voltage
Diode resistance above threshold
Diode resistance above threshold
Drops rapidly
Diode resistance in opposite direction
Diode resistance in opposite direction
Very high
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)