# How a plasma reacts with an AC electromagnet

Any metal conductor such as aluminium or copper is a conductor because of the free electrons in such metals.

Plasma also has free electrons so I would like to know if you can repel plasma the same way as aluminium is repelled when near an AC electro magnet?

If so how come when I spin a magnet near my plasma globe there is no noticeable reaction compared to an aluminium can?

• I'm not sure that your 'plasma globe' actually contains what physicists understand under plasma
– Danu
Jun 1 '14 at 13:05

The lorentz force on each electron due to the magnetic field is dependent on the vector velocity of the electron, , $\underline{\mathbf{F}}=Bq\underline{\mathbf{v}}$, and so reverses direction in tandem with the velocity of the electrons. Because this reversal is happening at ~35 kHz (reversal every ~30 $\mu s$) you don't see any deviations - you just can't see things that happen that fast!