AQA GCSE Combined Science Trilogy · 8464
Specification 6.2.1.3 · Paper 5, Paper 6
Revise: Required Practical: Investigating ResistanceA clip placed slightly away from the ruler's zero can introduce a length zero error. Resistance at the contacts can also contribute to the measured resistance. Check the contact positions and make secure connections rather than assuming every departure from the ideal graph is caused by the wire itself.