Year 11 GCSE (Higher) OCR Gateway Science Suite ELECTRICITY FOR GADGETS Lessons 1-2 (P6a) 1) …resistance is varied as a result of changing the length of resistance wire in a variable resistor 2) …equation: R = V / I 3) …resistance of an ohmic conductor from a voltage-current graph 4) …voltage-current graph for a non-ohmic conductor, such as filament lamp, in terms of changing resistance
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