Physics · Oct / Nov 2017 · Paper 12 · Question 34

A straight wire carries a current into the paper. The diagram shows three magnetic field lines around the wire. The current in the wire increases. What is the direction of the field lines and which change occurs to the field lines as the current increases?

1. Aclockwise; the lines move closer together
2. Bclockwise; the lines move further apart
3. Canticlockwise; the lines move closer together
4. Danticlockwise; the lines move further apart

As printed in the paper