1.   But not until he was in high school did it strike him like a poem that each winding of a wire coil increases the strength of its magnetic field.

2.   But the repairman used his screwdriver like a sword and sliced a wire coil inside the watch.

3.   Magnetic fields are created when electric currents flow through wire coils.

4.   The shaking makes a magnet move through a wire coil, generating current, which can be stored.

5.   The shaft of each key has tiny permanent magnets attached to it, and each shaft is surrounded by wire coils.

6.   When electricity passes through a wire coil, it generates a magnetic field that can, in turn, induce an electrical current in any nearby conducting material.

7.   When keys are pressed, the magnets move through wire coils that surround them.

8.   Passing an electric current through wire coils generates magnetic fields, which could be used to levitate trains.

9.   In recent years, doctors have often left behind tiny wire coils, called stents, to prop the arteries open.