There is no reason to believe that the Earth's magnetic field will change any time soon... or, for that matter, that anything extraordinary is going to happen in 2012.
The Earth's magnetic field has changed polarity hundreds of times in the geological past. This phenomenon is known as geomagnetic reversal. The frequency at which these reversals occur is not regular, but on average, it is estimated to happen every few hundred thousand years.
To reverse the magnetic field of an electromagnet, you can either reverse the direction of the current flowing through the coil or change the polarity of the power supply connected to the coil. This will change the direction of the magnetic field produced by the electromagnet.
An alternating current (AC) is produced when a wire cuts through magnetic field lines and experiences a change in polarity. This phenomenon is known as electromagnetic induction, where the changing magnetic field induces a current in the wire.
The magnetic field direction around the wire reverses when the direction of the current in the wire is changed. This is due to the right-hand rule that states the direction of the magnetic field is perpendicular to the direction of current flow.
In a magnetic field, the direction of movement is determined by the interaction between the magnetic field and the magnetic properties of the object or particle. The movement can be influenced by the polarity of the magnetic field and the orientation of the object's magnetic properties.
The Earth's magnetic field has changed polarity hundreds of times in the geological past. This phenomenon is known as geomagnetic reversal. The frequency at which these reversals occur is not regular, but on average, it is estimated to happen every few hundred thousand years.
People use Earth's magnetic field for navigation, such as in compasses to find direction. Animals, like birds and fish, can sense Earth's magnetic field to navigate during migration or find their way in the ocean.
sorry I forgot the answer. dummy!
The polarity of the Earth's magnetic field is recorded in igneous rocks, and reversals.
To reverse the magnetic field of an electromagnet, you can either reverse the direction of the current flowing through the coil or change the polarity of the power supply connected to the coil. This will change the direction of the magnetic field produced by the electromagnet.
The Earth's magnetic field changes over time because that is the way that God makes it.
An alternating current (AC) is produced when a wire cuts through magnetic field lines and experiences a change in polarity. This phenomenon is known as electromagnetic induction, where the changing magnetic field induces a current in the wire.
Nothing - The polarity of an electromagnet depends on the direction of current flow and you can effect the same change in orientation to the earth's field by moving the electromagnet rather than the earth's field.
Magnetic stripes on the ocean floor are formed as magma from the mantle rises at mid-ocean ridges and solidifies into rock. The Earth's magnetic field periodically reverses its polarity, causing magnetic minerals in the cooling rock to align with the prevailing magnetic field. These alternating magnetic orientations create stripes of normal and reversed polarity that are preserved in the oceanic crust as it spreads away from the ridges. By studying these magnetic stripes, scientists can reconstruct the history of the Earth's magnetic field reversals and the seafloor spreading process.
accorsing to the earths magnetic field
The magnetic field direction around the wire reverses when the direction of the current in the wire is changed. This is due to the right-hand rule that states the direction of the magnetic field is perpendicular to the direction of current flow.
Yes.