A-LevelPhysicsElectricityMay/June 2025Paper 1 Q321 Mark
A wire is made from a metal of constant resistivity. There is a constant current in the wire. Which statement about the potential difference across the wire is correct?
AIt is directly proportional to the length of the wire.
BIt is inversely proportional to the length of the wire.
CIt is directly proportional to the diameter of the wire.
DIt is inversely proportional to the diameter of the wire.
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of electricity within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep