32 HW Electrostatic Induction

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So, an object can be charged through **friction**, like rubbing your hair on a balloon, or it could also be **conduction**, touching another charged object, or charging by **induction**.

Depending on what that charged object is, maybe it is a _, then the electrons in there are mobile, they can move around, and that charge is going to start to dissipate or at least move within the object itself.

conductor like metal

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In _, like in _, all electrons are fixed, they can move a little bit, but they are always going to be stuck to that proton of the atom of which they are part.

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an insulator, .... plastic or in glass

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In this diagram of a charged insulator, where the left side is going to have a negative charge, the right side is going to have _.

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a neutral charge

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As we bring a positively charged glass rod to the electroscope, there is induction going on, it will impact the charges within the electroscope.

As the rod is pulled away - _.

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the leaves go back to where they were

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If a child went down the slide, friction of the hair on the slide actually _ and so now hair is _.

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pulled electrons off, positively charged

A good way to study **induction and conduction**, in the science lab, is to use something called an _.

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electroscope

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_, we are touching two objects so electrons can move.

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Conduction

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In _, the charges are going to be fixed wherever you put them.

an insulator

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As we bring a positively charged glass rod to the electroscope and if we touch the electroscope, now conduction takes place, we are actually transferring charges. As the rod is pulled away _.

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the leaves are going to be held apart

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When we are rubbing an object we can actually pull _ off or add _ to it.

electrons, electrons

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Remember it is going to be the electrons and the protons in the atoms that make up the material itself.

So, if we have a neutral object that means we are going to have an equal number of positive and negative charges. They are going to balance out, and there is going to be _.  

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no net charge

An electroscope has a metal ball at the top, a metal rod that goes through the middle, and _ on the bottom. They are all insulated from the surroundings with a rubber stopper at the top.

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metal leaves

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Remember, the _ are going to stay where they are, it is always the _ that are moving.

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protons, electrons

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If it is _, all of those charges, those electrons, are fixed. So we can add charges to one part of it and it does not mean the rest of it has to get charged.

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an insulator