What is Earth's Magnetic Field

It is now a common knowledge that Earth’s magnetic field is similar to that produced by a simple bar magnet. This means that Earth’s magnetic field has the structure of a dipole field. Do you know that the axis of the magnetic field is inclined by about 10 degrees to the rotation axis of the Earth? Its magnetic field intensity is about 30,000 to 60,000 nano Tesla (nT) at the earth surface. This intensity decreases as the inverse cube of the distance (1/R^3) from the earth. The internal field of the earth appears to be generated in the earth’s core by a dynamo process associated with the circulation of liquid metal in the core and driven by convective heat effect.

Voltage induction and magnetic fields

In a circuit, electrical charges move along a conductor line or wire. These charges when allowed to pass through a multimeter would create an anode and a cathode terminal. These terminals can be affixed to a coiled conductor line creating a station of magnetic field as stored energy. The whole set is called an inductance circuit.