RfReduce.Com BLOG
Art: Electric Fields 1 
We would like to understand the fields emanating from a cell phone or from any Radio Frequency (RF) transmitter that may be in our environment. Having introduced Magnet fields in previous articles, we will now delve into Electric fields.

An Electric field is another fundamental component of electricity, physics and technology. Like the Magnetic field, it is somewhat of an invisible influence that extends from (radiates from) a source. That source could be an actual antenna, or it could be a wide range of other electronic components.

In electrical circuits, the electricity has a potential. It is called voltage. Think of voltage as the push of the electricity. This push being the strength of the voltage to make current flow (electrons flow).

Consider a simple D cell battery that has a voltage of 1.5 volts DC (direct current). That 1.5 VDC is the push that the battery has. The battery wants to push electrons from its negative terminal, through some circuit, to its own positive terminal.

If we connect a small lamp between the positive and negative terminal, the battery will push electrons out of the negative terminal, through the lamp and back to the positive terminal.

Let's now consider the battery, without any external circuitry such as a lamp. Consider the battery just sitting by itself. There is an Electric field between the positive and negative terminals. You can think of this Electric field as lines extending between these battery terminals.

As the battery is just sitting there, the Electric field is not changing, so we refer to it as a Static field.

Remember, the Electric field exists only because of the push of the voltage. There does not need to be any flow of current for there to be an Electric field. This is a fundamental difference from the Magnetic field from a wire, which requires a flow of electrons for the field to be present.

In further articles we will discuss varying Electric fields, Induction with Electric fields and shielding of Electric fields.