Before searching for occult and arcane reasons like magnetic fields
that don't exist, I'd ask a question:
Does this dizziness occur within less than a minute after standing
up from your sitting position?
If so, it's a common problem. Low blood sugar caused by not eating
properly or not eating at all for 5-8 hours can cause dizziness on
standing suddenly, and it may be delayed by as a long as a minute.
various medical reasons exist as well.
Also, and this is a big one, if you use magnification constantly or
even just use reading glasses, taking them off or putting them on
can cause extreme dizziness and disorientation, especially of the
optic center of the lens does not coincide with your retinas optic
I use readers and a stong Optivisor at the same time, adjusted so I
can look through one or the ther, or both at the same time. It's not
unusual for me to remove them all to answer the door or whatever,
and be met by some serious, if temporary dizziness. Scared the heck
out of me when it first happened, and took my Doc a while to track
it down, but it is real and it is common.
I'm not saying that is what is causing YOUR problem, but if it
persists, I would visit my physician and lay the electrical/magnetic
field myths aside. That's right up there with feeling quartz