The research paper "Earth's Magnetic Field" talks about the magnetic field which is the area which is under the influence of magnetic force and is a vector quantity, i.e. it is denoted in terms of a direction and magnitude, and is measured in Teslas in SI units which are equivalent to (Newton x second)/(coulomb x meter).
The magnetic field allows human beings to produce many important devices. The relationship between magnetic field and electric current has enabled humans to produce electric currents in all electric devices such as blenders and power turbines. The magnetic field of Earth is similar to that produced by a bar magnet. The circulating electric currents surrounding the Earth’s surface and in the metallic core of Earth are the source of Earth’s magnetic force. The dynamo effect of these circulating electric charges helps in creating a magnetic field. The rotation is known to be the cause of the production of electric charges and dynamo effect. The area under the influence of Earth’s magnetic force is known as Magnetosphere. A scientist Mariner 2 discovered that the magnetic field of Venus is not as strong as that of Earth. Though the iron content of these two planets is almost same, yet the strength of magnetic field is different. The reason for the difference is the speed of movement of these two planets. Earth takes 235 days to complete a rotation whereas Venus takes 243 days. The rotation period of Venus is too slow to result in dynamo effect. The evidence of this was found on rocks.