Electric and magnetic fields are two types of electromagnetic fields that are created by the movement of electrically charged particles. Electric fields are caused by stationary charges, while magnetic fields are caused by moving charges.
Electric fields and magnetic fields can interact with each other, creating a phenomenon known as electromagnetic induction. This occurs when a changing magnetic field creates an electric field, or when a changing electric field creates a magnetic field.
The main sources of electric and magnetic fields are electric currents and charges. These can be found in natural sources, such as lightning and the Earth's magnetic field, or man-made sources like power lines and electronic devices.
There is ongoing research on the potential health effects of exposure to electric and magnetic fields. While some studies have shown a possible link between long-term exposure to high levels of these fields and certain health issues, the overall consensus is that the levels of fields typically encountered in everyday life are not harmful.
Electric and magnetic fields are typically measured using specialized instruments such as gaussmeters and voltmeters. The strength of these fields is measured in units of gauss or tesla for magnetic fields, and volts per meter for electric fields.