the turn density is n=N/L = turns/m. If the current in the solenoid is I = amperes. and the relative permeability of the core is k = , then the magnetic field at the center of the solenoid is. B = Tesla = gauss. The Earth's magnetic field is about half a gauss.The relative permeability of magnetic iron is around 200.n the above expression for the magnetic field B, n is the number of turns per unit length, sometimes called the turns density.
Definition of con artist. : a person who tricks other people in order to get their money The couple lost their savings to a con artist who told them he was an investment broker.
adv. 1  In opposition or disagreement; against: debated the issue pro and con. 2  To direct the steering or course of (a vessel). 3  To swindle (a victim) by first winning his or her confidence; dupe. 4  A swindle. 5  Of, relating to, or involving a swindle or fraud: a con artist; a con job. 6  A convict.