Flemeng's Left Hand Rule, using your left hand, with the thumb, 1st finger and 2nd finger all 90 degrees to one another. This is covered...

When a current flows through a wire, magnetic field is produced around the wire. This magnetic field can be detected using a compass....

A short-cut is to think about a couple who are in love or quarrel. When in love, both are walking together in one direction holding hand...