You are talking about piezoelectricity. See related linksbelow.
because when the ions can move around freely, they can conduct electricity better
No, permanent magnets are not produced by electric currents. They are made from materials that are magnetized and retain their magnetic properties without the need for external electric currents.
In the process of displaying images on a screen, a monitor uses electric currents to control the flow of electrons in a cathode ray tube or the liquid crystals in an LCD screen. This manipulation of electric currents generates a magnetic field that helps create the images visible on the monitor.
Piezo electric quartz crystals.
The letter "I" is typically used to represent electric currents in equations.
Yes
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Electric currents
An ampere meter
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Electric currents in the ionosphere
Yes, the outer fences had electric currents.