Ch. 5 - Electrostatics

3 types of Electrification

friction, contact, induction

Friction

removal of an electron by rubbing objects of different kinds together

Contact

a charged object touches an object with no charged

Induction

objects become near but not touching electrons can't jump from one to the other, they only rearrange

Electrons can only move from...

higher negativity to lower negativity

Opposites _______ , Like _______

attract, repel

Non-conductor

do not allow the free flow of electrons (example: plastic, hard rubber, glass)

Conductor

allow the free flow of electrons (example: silver, copper, aluminum)

Semi-conductor

in some cases allows electrons to flow and in other cases it doesn't allow electrons to flow (example: silicon)

What is the charge of the Earth?

neutral charge

When you charge by induction you end up with what kind of charge?

the opposite charge of what you started with

What side of the body do you ground from?

distal end

Grounding

connecting something thats charged to wet earth; you have to connect to the ground via wire

When grounding a positively charge object, electrons will move from...

the ground to the object

When grounding a negatively charged body, electrons will move from...

the object to the ground

When doubling the strength of one of the two unlike charges...

the force of attraction will be doubled

When doubling the distance between two unlike charges...

the force of attraction will be 1/4 greater

Charges reside on...

the external surface

Charge is greatest where the curvature is...

the greatest

only ______ charges can move

negative (or electrons)

The electroscope can detect...

the presence of x-rays, the presence of charge, and the sign of charge

If you bring a positively charged rod near a positively charged electron scope, what will the leaves do?

the leaves will repel (or pull away from eachother)

If you bring a negatively charged rod near a positively charged electroscope, what will the leaves do?

the leaves will collapse (or come together)

What is an example of static discharge?

lighting