What was the early recognition of Earth's magnetic field? State the dynamo effect.
(N/A) Early recognition of Earth's magnetic field suggested that a giant bar magnet was placed along the axis of rotation of the Earth,deep in its interior,which was believed to be the cause of the magnetic field.
Currently,the magnetic field is thought to arise due to electrical currents produced by the convective motion of metallic fluids (consisting mostly of molten iron and nickel) in the outer core of the Earth. This phenomenon is known as the dynamo effect.
Currently,the magnetic field is thought to arise due to electrical currents produced by the convective motion of metallic fluids (consisting mostly of molten iron and nickel) in the outer core of the Earth. This phenomenon is known as the dynamo effect.
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Similar Questions
$A$ short bar magnet placed in a horizontal plane has its axis aligned along the north-south direction. Null points are found on the axis of the magnet at $20 \ cm$ from the centre of the magnet. The Earth's magnetic field at the place is $B$ and the angle of dip is $0^{\circ}$. If the total magnetic field on the normal bisector of the magnet at $20 \ cm$ from the centre of the magnet is $0.6 \ G$,then the magnitude of $B$ is: (in $G$)
At a place,the horizontal and vertical intensities of the Earth's magnetic field are $0.30 \ G$ and $0.173 \ G$ respectively. The angle of dip at this place is.....$^o$
Medium
View SolutionFill in the blanks:
$(i)$ The declination is ...... at higher latitudes.
$(ii)$ The declination in India is ...... .
$(i)$ The declination is ...... at higher latitudes.
$(ii)$ The declination in India is ...... .
Medium
View SolutionAt a given place on the Earth,the angle between the Magnetic Meridian and the Geographic Meridian is called . . . . . . .
If the angles of dip at two places are $30^{\circ}$ and $45^{\circ}$ respectively,then the ratio of horizontal components of earth's magnetic field at the two places will be
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