Question

***Will give medals***!!!
Please help me understand charging by friction, charging by conduction, and charging by induction. Also, for charging by friction, how do you know whether the item starts out with a positive or negative charge if you don't have it on the chart? For example, glass and silk?

Answer 1

"...if you don't have it on the chart..."
Which chart are you talking about ??

Answer 2

The chart with the order of conductors to semiconductors to insulators.

Answer 3

"...Also, for charging by friction, how do you know whether the item starts out with a positive or negative charge..."
Is this what you're looking for - http://en.wikipedia.org/wiki/Triboelectric_effect#Triboelectric_series

Answer 4

Nope :( Looking for help w/ electrostatics!

Answer 5

I'll advice you to refer to your book or Google for these terms -
charging by friction
charging by conduction
charging by induction

You can then ask the concepts you find confusing. I'll explain them to you. :)

Answer 6

Okay, I already have done that... What's most confusing to me is the charging by induction. I don't understand how in an electroscope, electrons can be transferred to the ground through the hand.. How are the negative electrons transferred from a positive pith ball? It's quite confusing

Answer 7

"... I don't understand how in an electroscope, electrons can be transferred to the ground through the hand..."
Human body is a conductor.

"...How are the negative electrons transferred from a positive pith ball?..."
Please elaborate this sentence.

Answer 8

I don't get how the negative electrons are transferred to the ground through the hand...