| Date | November 2015 | Marks available | 1 | Reference code | 15N.1.SL.TZ0.23 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 23 | Adapted from | N/A |
Question
An electron is moving parallel to a straight current-carrying wire. The direction of conventional current in the wire and the direction of motion of the electron are the same. In which direction is the magnetic force on the electron?
Markscheme
D
Examiners report
The conventional current is opposite in direction to the electron flow. So here we have essentially anti-parallel currents and the candidates should know that such currents keep well away from each other, ie they repel, leaving D as the correct response.
