Question
Describe the functioning of electrostatic precipitator along with a schematic diagram.
✓
Answer
Electrostatic precipitator:
- It is the most widely used method for removal of particulate matter, about 90% of particulate matter is removed from the exhaust of thermal power plants.
- It has electrode wires and a stage of collecting plates.
- The electrode wires are maintained at several thousand volts, which produce a corona that releases electrons.
- These electrons get attached to the (dust) particles and give them a net negative charge within a very small fraction of a second.
- The collecting plates are grounded and hence attract the charged particles.
- The velocity of air between the plates must be low enough to allow the particles to fall on them.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What is meant by ozone shield? Name two ozone depleting substances. How do the ozonedepleting substances affect the ozone shield? Write one damaging effects of ozone depletion on humans and plants respectively.
Define transcription. Write the names of the parts of the transcription unit in DNA. Draw a schematic diagram of the transcription unit.
Of the four major causes for the loss of biodiversity (Alien species invasion, habitat loss and fragmentation, over-exploitation and co-extinctions which according to you is the major cause for the loss of biodiversity? Give reasons in support.
What is spermatogenesis? Briefly describe the process of spermatogenesis.
Rose plants produce large, attractive bisexual flowers but they seldom produce fruit. On the other hand, Lady’s finger produces plenty of fruits. Analyse the reasons for failure of fruit formation in rose.
- What is an age pyramid?
- Explain with the help of figures, the three different types of age pyramids represented by human population.
In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions,
- Fill in (1) and (2).
- Why is the virus called retrovirus?
- Can the infected cell survive while viruses are being replicated and released?
List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
- State the objectives of animal breeding.
- List the importance and limitations of inbreeding. How can the limitations be overcome?
- Give an example of a new breed each of cattle and poultry.
What is Gametogenesis? Explain in detail the process of spermatogenesis and oogenesis.