Summary Comparison Table
This comparison covers Summary Comparison Table within I-V Characteristics for GCSE Physics. Revise I-V Characteristics in Extra Topics for GCSE Physics with 13 exam-style questions and 11 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 5 of 12 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 12
Practice
13 questions
Recall
11 flashcards
⚡ Summary Comparison Table
| Component | I-V Graph Shape | Resistance Behaviour | Ohmic? |
|---|---|---|---|
| Ohmic resistor (at constant temp) | Straight line through origin | Constant | Yes |
| Filament lamp | Curve through origin, flattening at high V | Increases with temperature | No |
| Diode (forward) | Near-zero then sharp upward curve from ~0.6 V | Very high below threshold, then very low | No |
| Diode (reverse) | Flat (virtually no current) | Extremely high (blocks current) | No |
Keep building this topic
Read this section alongside the surrounding pages in I-V Characteristics. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for I-V Characteristics
What does an I-V characteristic graph show for a component?
Explain why the I-V graph for a filament lamp is not a straight line.
Quick Recall Flashcards
13 questions on I-V Characteristics — practise free
Instant marking, adaptive difficulty, and 11 spaced repetition flashcards. Free until your GCSEs.
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