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Flashcards in Ch.15 Deck (25)
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1

Direct VS alternating current

DC- electrons move in ine direction Edison
AC- electrons alternate directions back and forth tesla

2

60 hertz means what for AC

60 times back and forth per second

3

Voltage

Pressure/push of an electron

4

Amperage

Amount of electrons moving
Where DANGER is

5

High volts low amperage ?

Harmless

6

Power definiton and equation

How quickly we use electricity
Power (watt) = volt x amp

7

1,500 watts = how many kilowatts

1.5

8

Why is philly power more money than where mr Moore lives

Philly=peco=limerick powerpoant= 350$ million
Others=met ed= cheap coal power plants

9

Conductor

Any substance that allows free flow of electrons
Low resistance to electric flow
Low ohm rating

10

Insulator

Any substance that doesn't transmit electricity well, high resistance to electric flow
High ohm rating

11

ohm

Greek
Measure resistance

12

Why are C batteries and A batteries different sizes yet both have 1.5 volts

Different amps ( c has more)

13

When mr Moore was connecting clips to light and battery why did he need to clip both clips to battery for light to come on

Because the electrons needed a circuit (circular pathway) to get to light
Lightbulb = load (part doing work)

14

Open switch vs closed switch

No light vs light

15

It takes about a day for one electron the jump from Adam to Adam and make it all the way through a wire so why does the light come on right away

Because electrons push their neighbor who pushes it's neighbor who push it it's neighbor until the last one right next to the light gets pushed and starts the light so the voltage is immediate

16

Thicker the wire =

Less resistance and more amps/electrons flow
Fast

17

Ground wire

Third prong on a cord
Prevents damage

18

Fuse vs circuit breaker

Fuse is you little box you put on a cord so that when the cord melts it will melt the fuse first instead of the actual cord and it will break a circuit to warn you
A circuit breaker replaced fuses and it's just a switch and it does the same thing but when you flick a switch it open and closes the system

19

GFI

Ground fault interpretator

20

How did tesla use Niagara falls

Niagara Falls water would turn water turbines connected by shafts charging power motors

21

Series circuit vs parallel circuit also draw out

Series circuit- only one pathway if one of the loads break then it would shut everything down because electrons have to travel through one path and if you add a ball the voltage drops causing the lights to dim

Parallel-many different pathways for electrons so if one of them breaks in the electron still has other pathways to go through to get it to work and voltage is constant

22

Solenoid

Makes motion with electromagnet
Led to Meter that led to motor

23

Explain motors

There is a little coil between a magnet and the opposite ends of the coil and the magnet start to attract so the coil spins but since the quill now has momentum at overshoots and a commutator changes the direction of the flow and it starts spinning again overshoot spins other way overshoots and keeps going.

24

Motor and generator

Same thing ran backwards they make electricity with mechanical energy

25

Electricity

Electrons in motion
Also called electric current