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1 PHYSICS MCQS

Electrostatic precipitators are used to control which type of pollution?

  • Air pollution
  • Water pollution
  • Solid waste
  • Noise pollution
Correct Answer: A. Air pollution

Detailed Explanation

The correct answer is Air pollution. Electrostatic precipitators (ESPs) are devices used in industries and power plants to remove suspended particulate matter from exhaust gases before they are released into the atmosphere. They are highly effective in controlling air pollution and are widely used to reduce the emission of dust, smoke, and other fine particles.


The working principle of an electrostatic precipitator is based on electrostatic attraction. When polluted gas passes through the ESP, the particles in the gas are given an electric charge using high-voltage electrodes. These charged particles are then attracted to oppositely charged collector plates. Once deposited, the plates are periodically cleaned to remove the collected dust. This method allows industries to significantly reduce the release of particulate matter, which contributes to smog, respiratory diseases, and environmental hazards.


Electrostatic precipitators are particularly important in coal-fired power plants, cement factories, steel mills, and other industrial facilities where large amounts of smoke and dust are generated. Unlike simple filters or mechanical scrubbers, ESPs can handle high volumes of gas with very low pressure drop and are extremely efficient in capturing fine particles as small as 1 micrometer.


It is important to note that ESPs are not used for water pollution, solid waste, or noise pollution. They specifically target airborne particles in industrial emissions, making them a crucial technology for air quality management and environmental protection.


🔑 Key Facts:




  • Electrostatic precipitators (ESPs) remove fine particulate matter from exhaust gases.




  • Work on the principle of electrostatic attraction.




  • Widely used in power plants, cement, and steel industries.




  • Extremely efficient for particles as small as 1 micrometer.




  • Helps control air pollution, not water or noise pollution.




👉 Final Answer: Electrostatic precipitators are used to control Air pollution.




 

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