A flexible metal wire is suspended horizontally in a magnetic field. When current flows through the wire from left to right, it experiences a downward force.
If the direction of the current is reversed while the magnetic field remains unchanged, in which direction does the magnetic force on the wire act?
downwards
upwards
into the page
out of the page
19 exam-style questions on CIE IGCSE Physics 4.5.4a Force on a current-carrying conductor. Each one has a worked solution and a mark scheme showing where the marks go.