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un:magnetic-dipole-field [2024/11/26 07:57] – created asadun:magnetic-dipole-field [2024/11/26 08:31] (current) asad
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 {{https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Dynamo_Theory_-_Outer_core_convection_and_magnetic_field_generation.svg/1024px-Dynamo_Theory_-_Outer_core_convection_and_magnetic_field_generation.svg.png?nolink&650}} {{https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Dynamo_Theory_-_Outer_core_convection_and_magnetic_field_generation.svg/1024px-Dynamo_Theory_-_Outer_core_convection_and_magnetic_field_generation.svg.png?nolink&650}}
  
-The magnetic field is generated due to the motion of liquid metal in the Earth's outer core. Convection occurs in the liquid outer core due to the heat from the solid inner core. If the inner core is like a stove, the outer core is like a pot of water on that stove; just as the heat from the stove causes bubbles in boiling water, the heat from the inner core causes convection in the liquid metal of the outer core. Due to the Coriolis force generated by the Earth's rotation, this convection occurs in a circular path. The circular motion of the liquid metal creates current loops, resulting in a magnetic field in the direction of the loop's area vector (\(\mathbf{A}\)). If \(I\) is the current flowing through the loop, then the magnetic dipole moment of this field is:+The magnetic field is generated due to the motion of liquid metal in the Earth's outer core. Convection occurs in the liquid outer core due to the heat from the solid inner core. If the inner core is like a stove, the outer core is like a pot of water on that stove; just as the heat from the stove causes bubbles in boiling water, the heat from the inner core causes convection in the liquid metal of the outer core. Due to the [[coriolis-force|Coriolis force]] generated by the Earth's rotation, this convection occurs in a circular path. The circular motion of the liquid metal creates current loops, resulting in a magnetic field in the direction of the loop's area vector (\(\mathbf{A}\)). If \(I\) is the current flowing through the loop, then the magnetic dipole moment of this field is:
  
 $$ \vec{\mu}_E = I\mathbf{A} $$ $$ \vec{\mu}_E = I\mathbf{A} $$
  
-The average magnitude, according to our calculations, is \(\mu_E = 8.05\times 10^{22}\) A m\(^2\). Using the Biot-Savart law, it is straightforward to calculate the magnetic field created along the area vector at the center of a current loop.+The average magnitude, according to our calculations, is \(\mu_E = 8.05\times 10^{22}\) A m\(^2\). Using the [[Biot-Savart law]], it is straightforward to calculate the magnetic field created along the area vector at the center of a current loop.
  
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un/magnetic-dipole-field.1732633032.txt.gz · Last modified: by asad

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