I would like to ask your opinions on what would happen if you had a liquid containing charged particles and then applied a sinusoidal magnetic field? 1. would the particles move in one direction and when the current changes direction then move in the other direction? 2. would there be a macroscopic flow in the liquid as a result? 3. just to check, can you have a sinusoidal current flowing through a solonoid which causes the magnetic field to change direction? Thanks for any opinions on this.