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Electricity, magnetism and electromagnetism
Quick questions on Current-voltage characteristics of components - CCEA GCSE Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is measuring an I-V characteristic?Show answer
To find an I-V characteristic, you vary the voltage across a component, measure the current through it (ammeter in series) and the voltage across it (voltmeter in parallel), and plot current () against voltage (), often for both directions.
What is q1?Show answer
What shape is the I-V graph for an ohmic resistor at constant temperature? [1 mark]
What is q2?Show answer
Why does the I-V graph of a filament lamp curve? [2 marks]
What is q3?Show answer
In which direction does a diode allow current to flow? [1 mark]
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