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poojarao
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A compass needle held horizontally is only afftected by the horizontal component of the magnetic flux. What do you think will happen to a compass needle at the magnetic north pole?
Earth's magnetic field is a magnetic field that surrounds and protects our planet from charged particles in the solar wind. It is generated by the movement of molten iron and nickel in the Earth's outer core.
Earth's magnetic field plays an important role in protecting us from harmful cosmic radiation, which can cause health problems. It also helps birds and other animals navigate during migration, and is used for navigation by humans as well.
No, Earth's magnetic field is not constant. It is constantly changing and shifting in strength and direction. Scientists have observed that the magnetic field has weakened by about 9% over the past 200 years.
The changes in Earth's magnetic field are caused by the movement of the liquid iron and nickel in the Earth's outer core. This movement creates electric currents which generate the magnetic field. Other factors, such as changes in the Earth's rotation and movements of the Earth's crust, can also affect the magnetic field.
Yes, Earth's magnetic field has reversed in the past, with the north and south poles switching positions. This has happened several times throughout Earth's history, and the last reversal occurred about 780,000 years ago. Scientists are still studying the causes and potential effects of magnetic field reversals.