The two main types of electric fields are:
- Static Electric Fields (or Electrostatic Fields):
- These occur when the electric charges are
stationary or not moving.
- The electric field lines around a charge are fixed in place and point away from positive charges and towards negative charges.
- A common example is the electric field created by a charged balloon or a charged object that is not moving.
- Dynamic Electric Fields (or Time-Varying Electric Fields):
- These occur when the electric field changes with time, usually due to the movement of charges (like in an AC current) or when there's a changing magnetic field.
- These are associated with electromagnetic waves (like radio waves or light) where both electric and magnetic fields vary together.
- An example would be the electric field in a circuit with alternating current (AC) or the field associated with a changing magnetic field.
In simple terms:
- Static = charges at rest, field doesn't change with time.
- Dynamic = charges moving or changing over time, creating a time-varying field.