What this tests
Syllabus point 4.5 — Electromagnetic effects, in Electricity and magnetism. Difficulty hard (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Physics 0625 · 4.5 Electromagnetic effects
November 2009 · Paper 11 · Question 35
One real Cambridge question from Electricity and magnetism, with the official answer. Cambridge has printed this question 2 times.