Chapter 15: Electricity Flashcards

1
Q

Electric currents

A

Electrons put on motion

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2
Q

Two types of electric current and explain

A

D.C.- electrons move in one direction, can’t travel long distances(1 miles plus), needs a source and expensive pathway for them to travel through
AC- electrons move back and forth and can go long distances

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3
Q

What outlets used in homes

A

60 hertz means the electrons go back and forth 60 times/seconds

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4
Q

Why do electrons choose to move

A

Voltage pushes them and the higher the voltage the more electrons want to move and jump

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5
Q

Amperage

A

The amount or number of electrons moving

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6
Q

Power is measured in

A

Watts

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7
Q

Kilowatt

1.5 kilowatts

A

1000 Watts

1,500 watts

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8
Q

Conductor

A

Is any substance that allows free flow of electrons

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9
Q

Insulator

A

Substance that doesn’t transmit electricity well

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10
Q

Nichrome

A

Nickel chromium wire=metal that conducts but not well;enough resistance to heat it’s in toasters

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11
Q

Circuit

A

Circular pathway

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12
Q

Load

A

Part of circuit doing work

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13
Q

Why does light come on right away if it takes a day for one electron to jump from atom to atom and make it through the wire/circuit?

A

Bc electron pushes her neighbors who pushes her neighbor etc so voltage is immediate

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14
Q

The thicker the wire

A

More amps and electrons can flow so it’s faster

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15
Q

Ground wire

A

Third prong on cord it prevents damage

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16
Q

Fuse

A

When a cord melts it melts the fuse instead of the cord and it breaks circuit

17
Q

Circuit breakers replace ______

What do they do

A

Fuses

Switches open and close and that turns on or off the System and prevents fire

18
Q

Short circuit

A

Current flow is bypassing the load

19
Q

Edison nicknamed

A

The napoleam of inventions

20
Q

The name of edisons co

Competition?

A

Edison General Electric company

Competition= Westinghouse and tesla electric goes 100s of miles bc only a few

21
Q

Tesla helped the battle of currents by

A

Building electric AC motor that was much more efficient than DC
THEREFORE WESTINGHOSUE WAS WINNING

22
Q

Edison GE became

A

General Electric and joined forces with Westinghouse to build a power plant

23
Q

Tesla made it possible

A

For getting electricity to all USA also elevators electric motors cities blenders washing machine etc

24
Q

Series circuit

A

Electricity goes through a series of loads it has less voltage if you add more loads the power lessens and the light gets dimif you breaks pathway by a switch or if a wire breaks the whole system shuts down so if one bulb blows the whole system dos too

25
Parallel circuit
Have parallel wires and alternate paths in case in burns out the rest of the lights are still ok the voltage is constant
26
Solenoid
Basis of Bella and starting a car you switch the electricity on and off the ''tis hit the gear and that turns the car on
27
How do meters work
If you run electricity through the wires it creates an electromagnet. The needle moves based upon electricity put through the wire/coil. Needle moves forward and backwards and create a meter affect
28
How motors work
Every time cool makes a 1/2 turn direction of current switches
29
Commutator
Device that switches the direction if current in motors | ELSCTRIC MOTORS CHANGED THE WORLD
30
type of superconductor
Graphemes and it can tore mor eelectricty and charge fagster
31
A ____ and a ________ are the same thing run backwards
Motor and generator
32
Alternate types of electricity
Windmills photovoltaic cells solarc cells
33
What kind of fields are photovoltaic solar cells put on
Brown field
34
Photovoltaic solar cells made
From silicon crystals bc when aunlight hits the silicon atom an electron is kicked off