Can you make a magnet be more magnetic (attracting with greater intensity) by using a variable voltage source and increasing the amplitude?

Like if I attached an iron blob to something, and had a magnet being powered by an electric circuit nearby. By increasing the intensity of the circuit, would this cause the magnet to pull on the iron blob even greater?

 

An electromagnet becomes more attractive as the current in the electric coil around it increases. Volume 1, chaper 14 of the E-book on this site gives a discussion of the electromagentic phemenon.

For your example - yes, the electromagnet will pull harder as current becomes greater (substitute that for "intensity of the circuit"). There is a limit to the magnetic field that can be produced, but any increase in current below that point will produce more pull.

 

Thanks. I should have remembered the basics of this. I'll read up on it. I have an idea that will change the world!