Spray painting and crops, smoke precipitators, defibrillators
1 of 9
Explain why electrostatic dust/ smoke precipitators are used
Gases emitted from the. Chimneys of many factories and power stations contain harmful particles that pollute the atmosphere. A dust precipitator is used to remove harmful smoke particles from a chimney.
2 of 9
Explain how dust precipitators work at removing smoke
Metal grids are installed in the chimney and are connected to a high potential difference (voltage). The dust becomes positively charged as it passes the grid, inducing a positive charge on the dust. The dust particles are attracted to the negatively
3 of 9
Once the dust is attracted to the metal plates, how is it removed?
At intervals the plates are vibrated and the dust falls down to a collector.
4 of 9
Explain how electrostatics are used for paint spraying
The paint particles are given a negative charge so that they repel each other, forming a fine spray. This ensures that the paint is applied evenly. The panel to be sprayed is positively charged so it attracts to the negatively charged paint.
5 of 9
Give three advantages to using electrostatic paint
The paint can get in awkward nooks and crannies or shadows of the object, giving an even coat with less waste of the paint, the paint sticks to the car.
6 of 9
Explain electrostatic paint in terms of electron movement
The paint gains electrons as it passes through the nozzle of the gun, so becomes negatively charged. The car panel has lost electrons so is left positively charged . The car attracts the positively charged paint .
7 of 9
As the paint sticks to the car what happens to the charges?
As the paint sticks to the car, the charges cancel so the car becomes neutrally charged and no more paint is attracted. The car receives an even coat of paint.
8 of 9
Explain how electrostatics is useful for restarting the heart.
Two paddles are charged and are put in good electrical contact with the patient's chest using gel. Charge is then passed through the patient to make the heart contract.
9 of 9
Other cards in this set
Card 2
Front
Explain why electrostatic dust/ smoke precipitators are used
Back
Gases emitted from the. Chimneys of many factories and power stations contain harmful particles that pollute the atmosphere. A dust precipitator is used to remove harmful smoke particles from a chimney.
Card 3
Front
Explain how dust precipitators work at removing smoke
Back
Card 4
Front
Once the dust is attracted to the metal plates, how is it removed?
Back
Card 5
Front
Explain how electrostatics are used for paint spraying
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