Current-voltage characteristics (AQA A-Level Physics): Flashcards

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Current-voltage characteristics
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Ohm's Law for ohmic conductor

I∝VI \propto V at constant physical conditions

Resistance of ohmic conductor

Constant

II-VV graph of ohmic conductor

Straight line through origin

Diode in forward bias behaviour

Current flows after threshold voltage reached

Diode in reverse bias behaviour

Very high resistance, minimal current

Diode II-VV graph characteristic

Highly asymmetric

Filament lamp resistance as current increases

Increases as it heats up

Filament lamp II-VV graph at high current

Curves (voltage rises, current slower rate)

Ammeter resistance assumption

Zero resistance

Voltmeter resistance assumption

Infinite resistance

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Electricity

Current electricity

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Electricity

Current electricity

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Electricity

Current electricity

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Electricity

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