The force coil works on the same pr

The force coil works on the same principle as an audio speaker: AC electric current passed
through a wire coil generates an oscillating magnetic field, which acts against a permanent magnet’s
field to produce an oscillating force. In the case of an audio speaker, this force causes a lightweight
cone to move, which then creates sound waves through the air. In the case of the Coriolis meter
assembly, the force pushes and pulls between the two metal tubes, causing them to alternately
separate and come together (shake in opposite directions).