Hi, I have a few questions about magnetic field strength and was wondering if someone could get me started in the right direction? Firstly I would like to know if it is possible to calculate the force applied to a conductive gas or indeed a solid object (such as a metal rod) inside a magnetic pinch (from a copper work coil)? Secondly would it be possible to calculate the strength of the magnetic field from a copper coil electromagnet? And lastly is there a way to determine the strength of the magnetic field if it has to pass through another object, in this case a sheet of tungsten at varying thicknesses? Thanks in advance for any help, Curtis.