SCI206 Lecture Notes - Lecture 4: Air Filter, Lightning, Electrostatic Precipitator

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It is a theoretical concept which we use to describe the relative number of protons and electrons on a given material: If there are more negative charges (electrons) than positive ones (protons), it is negatively charged. If there are more positive charges than negative ones, it is positively charged: we measure charge in coulombs - a proton is +1 c and an electron is -1 c. Explain what coulomb"s law is: coulomb"s law describes the nature of the attraction between two charged objects - like charges repel, opposite charges attract, furthermore, the strength of this attraction is affected by: Distance between objects (the square of it) Explain how the machine worked where you turn a crank and every so often there would be a flash of. Discuss the 3 different types: dust is basically neutral particles floating in the air, there are 3 types: Regular dust: rock, dirt, organic matter, etc.

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