P4b Uses of static electricity By the end of this lesson you should be able to: Describe and explain how static electricity can be useful for electrostatic.

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P4b Uses of static electricity By the end of this lesson you should be able to: Describe and explain how static electricity can be useful for electrostatic dust precipitators to remove smoke particles etc from chimneys: metal plates/grids put into chimneys; connected to a high PD; dust particles attracted to plate/grid; dust attracts together to form larger particles; dust falls back down chimney when particles are heavy enough. Describe and explain how static electricity can be useful for paint spraying: spray gun charged; paint particles charged; repel giving fine spray; object charged oppositely to paint; attracts paint; even coat, less waste, shadows painted. Describe and explain how static electricity can be useful for restarting the heart when it has stopped (defibrillator): paddles charged; good electrical contact with patient’s chest; charge passed through patient to make heart contract; care taken not to shock operator.

Defibrillation paddles charged; good electrical contact with patient’s chest; charge passed through patient to make heart contract; care taken not to shock operator.

Electrostatic Paint spraying spray gun charged; paint particles charged; repel giving fine spray; object charged oppositely to paint; attracts paint; even coat, less waste, shadows painted.

Electrostatic dust precipitator metal plates/grids put into chimneys; connected to a high voltage; dust particles attracted to plate/grid; dust attracts together to form larger particles; dust falls back down chimney when particles are heavy enough.