P4b - Uses of electrostatics

P4b - Uses of electrostatics

1. Defibrillators

   • Useful for restarting the heart when it has stopped

2. Electrostatic dust precipitators

   • Static electricity can be useful for electrostatic dust precipitators to remove smoke particles etc from chimneys
   • 1. metal plates/grids put into chimneys, with negative charge 2.dust particles gain electrons as they move through the grid 3.(negative) dust particles attracted to earthed plates 4.dust falls back down chimney/removed at intervals

3. Spray Painting

   • The spray gun is charged positively, which causes every paint particle to become positively charged.
     • Like charges repel and the paint particles spread out.
       • The object to be painted is given a negative charge and so attracts the paint particles.
   • The advantages of using this system are that less paint is wasted, the object receives an even coat and the paint covers awkward ‘shadow’ surfaces that the operator cannot see.

Images and files in the map