The concept behind generating electricity from earth's magnetic field is based on the principle of electromagnetic induction. It states that a changing magnetic field can induce an electric current in a conductor. In this case, the earth's magnetic field acts as the changing magnetic field and the conductor can be a coil of wire.
To harness the earth's magnetic field, we need to use a device called a generator. The generator consists of a coil of wire that is rotated within the earth's magnetic field. As the coil rotates, the magnetic field lines cut across the wire, inducing an electric current. This current can then be collected and used as electricity.
One major advantage of generating electricity from earth's magnetic field is that it is a renewable source of energy. The earth's magnetic field is constantly present and does not need to be replenished. Additionally, it does not produce any harmful emissions, making it a clean source of energy.
One limitation is that the amount of electricity generated is relatively small compared to other sources. This is because the earth's magnetic field is relatively weak and the amount of energy produced is dependent on the strength of the magnetic field and the size of the generator. Additionally, the technology to harness this type of energy is still in its early stages and requires further development.
The electricity generated from earth's magnetic field can be used in various ways, just like any other source of electricity. It can power homes, businesses, and even vehicles. It can also be used to charge batteries for portable devices. However, due to the limitations mentioned earlier, it is currently not a major source of electricity production but has potential for future developments.