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suryakanta06
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why Earth behaves as a magnet
sir i m talking about the existence of two magnetic poles.what is the reason behind it and what property of the make it happen.please explainAstronuc said:Is one referring to gravitation, a property of matter, or is one referring to the Earth's magnetic field, which is due to the liquid ferro-nickel core (mostly iron with some nickel)?
One explanation:suryakanta06 said:sir i m talking about the existence of two magnetic poles.what is the reason behind it and what property of the make it happen.please explain
http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.htmlOrigin of the Magnetic Field
Magnetic fields are produced by the motion of electrical charges. For example, the magnetic field of a bar magnet results from the motion of negatively charged electrons in the magnet. The origin of the Earth's magnetic field is not completely understood, but is thought to be associated with electrical currents produced by the coupling of convective effects and rotation in the spinning liquid metallic outer core of iron and nickel. This mechanism is termed the dynamo effect.
Rocks that are formed from the molten state contain indicators of the magnetic field at the time of their solidification. The study of such "magnetic fossils" indicates that the Earth's magnetic field reverses itself every million years or so (the north and south magnetic poles switch). This is but one detail of the magnetic field that is not well understood.
suryakanta06 said:sir i m talking about the existence of two magnetic poles.what is the reason behind it and what property of the make it happen.please explain
Studiot said:We believe the outer layers of the planet are solid but the core is liquid because the outer layers can transmit both types of seismological waves - S waves and P waves, but the core can only transmit P waves.
Solids can transmit both types of wave but liquids cannot.
P waves stands for pressure wave and S waves stands for shear waves. Liquids cannot support shear, only pressure.
Earth behaves as a magnet due to its magnetic field, which is generated by the movement of molten iron in its core. This movement creates electric currents, which in turn produce a magnetic field.
Earth's magnetic field acts as a shield against harmful solar radiation and cosmic particles, deflecting them away from the planet and protecting living organisms from their damaging effects.
The Earth's magnetic field is not constant and has been known to flip in polarity multiple times throughout history. This is due to changes in the Earth's core, which can alter the movement and strength of the magnetic field.
Yes, Earth's magnetic field can affect technology, particularly compasses and navigation systems that rely on its magnetic poles. Fluctuations in the magnetic field can also cause disruptions in satellite communications and power grids.
Scientists study Earth's magnetic field using tools such as magnetometers, which measure the strength and direction of the magnetic field. They also use satellites to map the magnetic field and track changes over time.