# Force on a conductor in a magnetic field

## Homework Statement

Bill knows that a solution with an ionic salt dissolved in itwill allow a current to flow. Bill finds this quite interesting, so he finds a piece of plastic tubing and hangs it from an apparatus. He pours seawater into the tube until it is full. He then moves a magnet around the tube. Bill then uses a cell to create a current in the solution. Will a force act on the tube? Explain your answer.

F = BIL

## The Attempt at a Solution

I have no idea. I'm not sure if F = BIL only applies to electron flow, or ion flow as well.

Hootenanny
Staff Emeritus
Gold Member
I have no idea. I'm not sure if F = BIL only applies to electron flow, or ion flow as well.
Nope, F=BiL works for all currents

You sure, got some proof? It is a bit far-fetched to just take someone's word for it. Because as far as I know, in electron flow, only electrons move. Whereas, in ion flow, cations and anions both flow in different directions.

Hootenanny
Staff Emeritus