This memory aid covers Memory Aid within Resistance & Ohm's Law for GCSE Physics. Revise Resistance & Ohm's Law in Electricity for GCSE Physics with 16 exam-style questions and 30 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 12 of 16 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 12 of 16
Practice
16 questions
Recall
30 flashcards
🧠 Memory Aid
VIR Triangle — "Very Important Relationship":
Write V at the top, I and R at the bottom. Cover the letter you want to find: V on top alone = I × R; I on bottom-left = V ÷ R; R on bottom-right = V ÷ I.
Non-ohmic components — "FDT Changes":
Filament lamp, Diode, Thermistor — these three all have changing resistance. Everything else (fixed resistors) is ohmic.
Thermistor vs LDR — "Hot is Less, Bright is Less":
Hotter thermistor = less resistance. Brighter LDR = less resistance. Both sensors work the same way — the thing they detect reduces their resistance.
Wire resistance factors — "LAMT":
Length (more = more R), Area (more = less R), Material, Temperature.
Keep building this topic
Read this section alongside the surrounding pages in Resistance & Ohm's Law. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Resistance & Ohm's Law
Which of the following best describes electrical resistance?
Explain what is meant by an ohmic conductor.
Quick Recall Flashcards
16 questions on Resistance & Ohm's Law — practise free
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