"Describe what is the cause of the magnetic field of the Earth: Describe what is meant by magnetic field strength and state its unit of measurement:
Select one or more:
The magnetic field of the earth is caused by Earth's rotation around the Sun:
The magnetic field strength B is the value of the current in the loop per unit area_ Magnetic field strength is measured in amperes per meter squared.
The magnetic field strength B is defined as the force acting per unit current in wire of unit length when the wire is perpendicular to the magnetic field lines Magnetic field strength is measured in Tesla: f. The magnetic field of the earth is caused by electric currents inside the molten iron core of the Earth:"