The Earth’s magnetic field is there to shield us from dangerous solar radiation caused by the sun. The field is believed to be generated in the Earth’s core.
Electricity is the flow of electrons. It is a type of energy that can build up one place (static electricity) or flow from one place to another (current electricity). In order for current electricity to flow, you must first have electric circuit, or a closed path for the electricity to travel.
Electrical power is the amount of electric current flowing due the applied voltage. In other words it is the amount of electricity of required to start a device or operate a load for one second. It is also measured in watts. Power (watts) = volts x current (amps) or W=VxA Electric field is defined as force per charge. Electric field strength = force/charge
Electricity and magnetism are two aspects of the same force. Every time an electric charge moves, a magnetic field is created while every time a magnetic field is varied, an electric field is created. For example moving electric charges generate magnetic fields, as seen with electromagnets. On the other hand, if you move a wire circuit through a magnetic field, it will generate an electric current.
Electric motors are powered by alternating (AC) or direct current (DC), which were developed first. Each work differently, but both use the power of an electromagnetic field.
The magnet in a generator pushes a number of electrons along and applies a certain amount of “pressure” to the electrons.
This pressure is the voltage, measured in volts, while the number of moving electrons in the electrical circuit is the amperage or current and measured in amps.
A magnetic field is created by moving electrons, so the more electrons in motion, the stronger the field will be. In a given length of wire there is a certain amount of electrons. The more “turns” or “wraps” of wire, the stronger the magnetic field created.