They vary widely and are not regular, but the earth's magnetic poles have flipped as frequently as twice in a 50,000 year timespan but have also held steady (not reversed) over as many as 50 million years.
every 250,000 years :)
250,000 years
The process of the reversal of the Earth's magnetic poles is called a magnetic flip. This occurs every 4 or 5 times per million years.
This is known as magnetic reversal when earth's magnetic poles change places.
Magnetic Reversal
To reverse the poles produced in a coil, you can simply reverse the direction of the current flow through the coil. This will change the magnetic field orientation and reverse the poles.
No, Earth's magnetic poles are not located exactly on its geographical poles. The magnetic poles are located slightly off-axis and can shift over time due to changes in the Earth's magnetic field.
2
every 250,000 years :)
No, it is not true. The magnetic poles may be influenced by Earth's rotation, but they are certainly not defined by it.
The strength of Earth's magnetic field is strongest at the magnetic poles, which are not necessarily aligned with the geographic poles. The magnetic field is weakest at the magnetic equator.
There is nothing -_-