Chapter 15: Electricity

Question 1

Electric currents

Answer 1

Electrons put on motion

Question 2

Two types of electric current and explain

Answer 2

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

Question 3

What outlets used in homes

Answer 3

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

Question 4

Why do electrons choose to move

Answer 4

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

Question 5

Amperage

Answer 5

The amount or number of electrons moving

Question 6

Power is measured in

Answer 6

Watts

Question 7

Kilowatt

1.5 kilowatts

Answer 7

1000 Watts

1,500 watts

Question 8

Conductor

Answer 8

Is any substance that allows free flow of electrons

Question 9

Insulator

Answer 9

Substance that doesn’t transmit electricity well

Question 10

Nichrome

Answer 10

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

Question 11

Circuit

Answer 11

Circular pathway

Question 12

Load

Answer 12

Part of circuit doing work

Question 13

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?

Answer 13

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

Question 14

The thicker the wire

Answer 14

More amps and electrons can flow so it’s faster

Question 15

Ground wire

Answer 15

Third prong on cord it prevents damage

Question 16

Fuse

Answer 16

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

Question 17

Circuit breakers replace ______

What do they do

Answer 17

Fuses

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

Question 18

Short circuit

Answer 18

Current flow is bypassing the load

Question 19

Edison nicknamed

Answer 19

The napoleam of inventions

Question 20

The name of edisons co

Competition?

Answer 20

Edison General Electric company

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

Question 21

Tesla helped the battle of currents by

Answer 21

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

Question 22

Edison GE became

Answer 22

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

Question 23

Tesla made it possible

Answer 23

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

Question 24

Series circuit

Answer 24

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

Question 25

Parallel circuit

Answer 25

Have parallel wires and alternate paths in case in burns out the rest of the lights are still ok the voltage is constant

Question 26

Solenoid

Answer 26

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

Question 27

How do meters work

Answer 27

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

Question 28

How motors work

Answer 28

Every time cool makes a 1/2 turn direction of current switches

Question 29

Commutator

Answer 29

Device that switches the direction if current in motors

ELSCTRIC MOTORS CHANGED THE WORLD

Question 30

type of superconductor

Answer 30

Graphemes and it can tore mor eelectricty and charge fagster

Question 31

A ____ and a ________ are the same thing run backwards

Answer 31

Motor and generator

Question 32

Alternate types of electricity

Answer 32

Windmills photovoltaic cells solarc cells

Question 33

What kind of fields are photovoltaic solar cells put on

Answer 33

Brown field

Question 34

Photovoltaic solar cells made

Answer 34

From silicon crystals bc when aunlight hits the silicon atom an electron is kicked off