Shared Flashcard Set

Details

Intro to Media Arts
Ch 4
36
Other
Not Applicable
09/14/2007

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Cards

Term
The 2 types of magnets
Definition
natural & those created synthetically
Term
What are loadstone and magnetite?
Definition
Types of magnets
Term
Where are natural magnets found
Definition
The earth's core - it takes up a small percentage of the core
Term
What are atoms composed of?
Definition
electrons, protons and neutrons
Term
2 straight wires next to each other both transmitting a flow of electrons in the same direction end up...
Definition
completing each other's magnetic fields
Term
electromagnets
Definition
wires coiled around nails increase teh power of the magnetic fields
Term
what are electromagnets capable of picking up?
Definition
things from material items to recording of audio and video on magnetic tape
Term
The 2 basic varieties of electricity
Definition
static and current
Term
static electricity
Definition
is present when an imbalance of positive and negative particles exist between 2 forms of matter.
Term
current electricity
Definition
charged particles departin from one atom for another. an electrical circuit is a secure path that the current can flow.
Term
conductor
Definition
any maerial allowin the smooth flow of charged particles
Term
alternating current (AC) can move in how many directions?
Definition
2
Term
direct current (DC) can move in how many directions?
Definition
1
Term
How is AC electricity created?
Definition
generators or dynamos that have huge rotating copper wire coils housed with giant magnets, Hydroelectro plants (dams) or windmills.
Term
current distributed along residential commercial networks
Definition
AC
Term
rectifier
Definition
converts AC to DC
Term
How many people in Manhattan still have DC power because of Thomas Edison?
Definition
1,000
Term
Nikola Tesla
Definition
Immigrated from Serbia and was hired to work directly under Thomas Edison.
Term
Who redesigned and improved the efficiency capabilities of DC current equipment?
Definition
Nicola Tesla
Term
What did Edison claim about DC power?
Definition
That it was safer than AC power
Term
How did Tesla and Westinghouse show off AC power?
Definition
By building a power station at Niagra Falls and in 1896 powered all of Buffalo, NY
Term
How many Hertz in the US is AC powered at?
Definition
60 Hertz
Term
The right slit in an outlet is called what?
Definition
Hot (where the electricity is)
Term
The left slit in an outlet is called what?
Definition
Neutral, which is an open pass linking to the ground in order to complete the circuit
Term
The bottom round hole in the outlet is for what?
Definition
The ground
Term
Larger residental outlets are used for what?
Definition
Washer and dryer, etc. using 240V with 2 hot connections (3 wire single phase)
Term
Does the electric voltage differ between residential and industry?
Definition
Yes
Term
How many phase power is the industrial standard?
Definition
3 phase
Term
Why is 3 phase needed for industrial powering
Definition
In order to eliminate the drop affect
Term
Can a 3-phase accomodate a single phase?
Definition
yes, it will only use one of the phases instead of all 3
Term
Whats the abbreviated symbol for Voltage?
Definition
E
Term
Whats the abbreviated symbol for Current?
Definition
A
Term
Whats the abbreviated symbol for Impedance?
Definition
Z
Term
Is Impedance for AC or DC?
Definition
AC
Term
Is resistance for AC or DC?
Definition
DC
Term
schematic
Definition
blueprint of electricity's course thru a plotted circuit
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