Which of the following force is utilized in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories ?
A. magnetic force
B. gravitational force
C. electrostatic force
D. frictional force
Answers
Answer: electrostatic force
Explanation:
because this force arise in between to charged particles, this force is either repulsive or attractive but in this case it should be attractive always by providing opposite charges to the material attracted and the material which is attracting another material.
C. electrostatic force
Explanation:
Electrostatic energy is created when wood rubs against our body. This is a phenomenon called charging by friction. We can see tiny sparks of light and hear a crackling sound when we take off the woolen sweater or a polyester shirt due to the formation of static electricity. It happens because the sweater or a polyester shirt gets charged due to friction between the sweater and the body.
Charged particles gets removed by electrostatic force. This is the principle used to remove dust, soot and fly-ash particles.
Option C is the answer.