# Ch.15 Flashcards

1
Q

Direct VS alternating current

A

DC- electrons move in ine direction Edison

AC- electrons alternate directions back and forth tesla

2
Q

60 hertz means what for AC

A

60 times back and forth per second

3
Q

Voltage

A

Pressure/push of an electron

4
Q

Amperage

A

Amount of electrons moving

Where DANGER is

5
Q

High volts low amperage ?

A

Harmless

6
Q

Power definiton and equation

A

How quickly we use electricity

Power (watt) = volt x amp

7
Q

1,500 watts = how many kilowatts

A

1.5

8
Q

Why is philly power more money than where mr Moore lives

A

Philly=peco=limerick powerpoant= 350\$ million

Others=met ed= cheap coal power plants

9
Q

Conductor

A

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

10
Q

Insulator

A

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

11
Q

ohm

A

Greek

Measure resistance

12
Q

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

A

Different amps ( c has more)

13
Q

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

A

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

14
Q

Open switch vs closed switch

A

No light vs light

15
Q

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

A

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
Q

Thicker the wire =

A

Less resistance and more amps/electrons flow

Fast

17
Q

Ground wire

A

Third prong on a cord

Prevents damage

18
Q

Fuse vs circuit breaker

A

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
Q

GFI

A

Ground fault interpretator

20
Q

How did tesla use Niagara falls

A

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

21
Q

Series circuit vs parallel circuit also draw out

A

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
Q

Solenoid

A

Makes motion with electromagnet

Led to Meter that led to motor

23
Q

Explain motors

A

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
Q

Motor and generator

A

Same thing ran backwards they make electricity with mechanical energy

25
Q

Electricity

A

Electrons in motion

Also called electric current