| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.HL.TZ1.23 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
A length of copper wire PQ is moved downwards through the poles of two horizontal bar magnets as shown below.
Compared to end Q, end P will have
A. fewer electrons.
B. more electrons.
C. fewer protons.
D. more protons.
Markscheme
A
Examiners report
The statistics of the question show confusion among the candidates who were obviously unclear about how to get the direction of the magnetic force on electrons.
Syllabus sections
Additional higher level (AHL) » Topic 11: Electromagnetic induction » 11.1 – Electromagnetic induction
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