| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.HL.TZ1.25 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 25 | Adapted from | N/A |
Question
A copper sheet is suspended in a region of uniform magnetic field by an insulating wire connected to a horizontal support. The sheet is pulled to one side so that it is outside the region of the field, and then released.
The uniform magnetic field is directed into the plane of the paper.
Which of the following is true for both the direction of the induced current in the sheet and the change in amplitude of the oscillations of the sheet with time?
Markscheme
B
Examiners report
If eddy currents are induced in the copper sheet, then there will clearly be damping of the oscillations. Hence B is the only possible answer.
Syllabus sections
Additional higher level (AHL) » Topic 11: Electromagnetic induction » 11.1 – Electromagnetic induction
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