Botany - Environmental Issues Question with Solution | TestHub

Electrostatic precipitator is widely used in removing particulate matter from air. This device has electrode wires [B] kept at several thousand volts that releases electrons by making a corona [A]. Dust particles get a net negative charge by attaching to these electrons. The collecting plates are grounded and attract the charged dust particles. The velocity of air is kept low to allow the dust to fall ultimately cleaning the air.