Chapter 15 : Electrostatics Flashcards
define the term static electricity
a stationary electric charge, typical produced by friction which can accumulate on an objects surface & discharge from there
expand on the law of conservation of charge
charge cannot be created or destroyed, it can only be transferred from one object to another
what is an electric conductor
a substance through which charge cab flow
what is an electric insulator
a substance through which charge cannot flow
define the term polarization
the process of separating charge in a substance
define the term “isolator”
switch in an electrical circuit just like the light switch to close and open a circuit
eyo go through the formulas like number of electrons = charge of an object divided by the charge of electron
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describe the shapes in which how charge is concentrated and spread evenly
charge is spread evenly over a metal sphere but concentrated at a sharp point charge
explain how a water molecule is polarized
- charge isn’t spread evenly
* one side is more positive and the other side of the molecule is more negative
how is lightening caused?
imbalance of electric charge between the earth and the thundercloud
Explain in full how lightening strikes the earth
- top part of the cloud broncos + and bottom is excess -
- negative charge from the bottom of the cloud force electrons on earth to move further into the ground making the surface +
How do we hear the thunder? what’s the occurrence happening in order for us to hear it?
- as lightening streams through the air, air heats up rapidly
- pressure waves form when hot air expands
- pressure waves create a shockwave that produces thunder
RANDO FACTS
- what is the irrational fear of thunder called?
- how many watts can a single lightening strike power a light bulb
- keraunophobia
2. 100 watt can power a light bulb for 90 days
