what is mean by electrostatic shielding.
Answers
A electrostatic field is a electric field produced by static electric charges. The charges are
static in the sense of charge amount (it is constant in time) and their positions in space
(charges are not moving relatively to each other). Due to its simple nature, the electrostatic
field or its visible manifestation – electrostatic force - has been observed long time ago. Even
ancient Greeks knew something about a strange property of amber that attracts (under certain
conditions) small and light pieces of matter in its vicinity. Much later this phenomenon has
been understood and explained as an effect of the electrostatic field. From this historical
viewpoint, it would be logical to start the presentation of electromagnetic field theory with
electrostatic field. Another reason, as it will be later clear, is its simplicity but also
applicability. Namely, electrostatic field plays an important role in modern design of
electromagnetic devices whenever a strong electric field appears. For example, an electric
field is of paramount importance for the design of X-ray devices, lightning protection
equipment and high-voltage components of electric power transmission systems and
hence an analysis of electrostatic field is needed.