Recent content by lujacobs

The outer diameter of the solenoid is 38mm, the inner diameter is 14mm. The diameter of the core is 12.5mm. Both are 70mm long. The number of turns on the coil is 335. I don't know what the permeability of the core is, but I approximate it at 10000*mu_0. But I can verify this experimentally...

Is is not held in place machanically. It is just a solenoid with an iron core in it.

Hello, I'm trying to levitate the iron core of an electromagnet at a certain postion. How can I calculate what the minimum currennt is that I need to put on the electromagnet to prevent the core from falling out at the bottom? Is there an equation to know at what position the core will be...