Physics · Oct / Nov 2024 · Paper 11 · Question 36

Students are asked to draw the pattern and direction of the magnetic field due to a direct current (d.c.) in a straight wire. Diagrams 1, 2 and 3 are three of their answers. The students do not know the direction of the current in the wire. [diagram showing three circular field patterns around a straight wire carrying direct current] Which diagrams show possible patterns and directions for the magnetic field due to the current in the wire?

1. A1, 2 and 3
2. B1 and 3 only
3. C1 only
4. D2 only

As printed in the paper