2006-10-14 12:39:46 · 13 answers · asked by mancyget 1 in Science & Mathematics ➔ Physics
In the south pole
2006-10-14 12:42:56 · answer #1 · answered by Anonymous · 0⤊ 1⤋
You can reverse the polarity of an electromagnet simply by reversing the current. With enough work, you can also reverse the polarity of a permanent magnet. Whenever you write data onto a magnetic disk, you are changing the polarity of the microscopic magnetic domains.
Of course, this and the previous answers presume you are talking about magnets.
2006-10-15 00:28:11 · answer #2 · answered by Frank N 7 · 0⤊ 0⤋
The Earths magnetic field is caused by the liquid part of the core rotating at a slightly different rate than the sold part. If it's rotating a tiny bit faster the magnetic field has one polarity, and a tiny bit slower gives it the other polarity. It sort of sloshes around a little so it's one way some eons and the other way other eons.
2006-10-15 10:43:35 · answer #3 · answered by Nomadd 7 · 0⤊ 0⤋
Yes. It appears to have happened a number of times in the earth's past. Why? Not known!
2006-10-14 21:20:25 · answer #4 · answered by cyberpat1957 1 · 0⤊ 0⤋
yes. and it can happen relatively 'quickly' in geological time, as best they know. the current north pole has been wandering closer and closer to the geographic north pole over the couple of hundred years. it's covered several hundred miles. there's a lot of evidence to suggest that the poles can flip, and it may take as little as a few hundred years to do so.
2006-10-14 19:43:31 · answer #5 · answered by anastrophe 2 · 2⤊ 0⤋
The earth's magnetic field has been gradually changing for some time now. Your fridge magnets will probably all fall off! (last bit was a joke)
2006-10-14 21:08:14 · answer #6 · answered by Sandee 5 · 0⤊ 0⤋
There is evidence in rock layers that this has happened many times in the history of our planet. Doomsday predictions say we are overdue for another one.
2006-10-15 16:22:41 · answer #7 · answered by Stanleymonkey 2 · 0⤊ 0⤋
Yes. Its happened many times, in earth's history.
2006-10-15 06:49:51 · answer #8 · answered by Sam 4 · 0⤊ 0⤋
The Earth's magnetic poles have flipped, if that is what you mean. Some think that they are due again.
2006-10-14 19:43:19 · answer #9 · answered by Anonymous · 1⤊ 0⤋
geometric reversals occur they are called chrons
and there is a timeline of chrons on wikipedia under chron or geometric reversal
see below
SAcientist are currently divided on why they occur
2006-10-14 19:54:29 · answer #10 · answered by Anonymous · 1⤊ 0⤋