Ch.15

Question 1

Direct VS alternating current

Answer 1

DC- electrons move in ine direction Edison

AC- electrons alternate directions back and forth tesla

Question 2

60 hertz means what for AC

Answer 2

60 times back and forth per second

Question 3

Voltage

Answer 3

Pressure/push of an electron

Question 4

Amperage

Answer 4

Amount of electrons moving

Where DANGER is

Question 5

High volts low amperage ?

Answer 5

Harmless

Question 6

Power definiton and equation

Answer 6

How quickly we use electricity

Power (watt) = volt x amp

Question 7

1,500 watts = how many kilowatts

Answer 7

1.5

Question 8

Why is philly power more money than where mr Moore lives

Answer 8

Philly=peco=limerick powerpoant= 350$ million

Others=met ed= cheap coal power plants

Question 9

Conductor

Answer 9

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

Question 10

Insulator

Answer 10

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

Question 11

ohm

Answer 11

Greek

Measure resistance

Question 12

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

Answer 12

Different amps ( c has more)

Question 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

Answer 13

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

Question 14

Open switch vs closed switch

Answer 14

No light vs light

Question 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

Answer 15

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

Question 16

Thicker the wire =

Answer 16

Less resistance and more amps/electrons flow

Fast

Question 17

Ground wire

Answer 17

Third prong on a cord

Prevents damage

Question 18

Fuse vs circuit breaker

Answer 18

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

Question 19

GFI

Answer 19

Ground fault interpretator

Question 20

How did tesla use Niagara falls

Answer 20

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

Question 21

Series circuit vs parallel circuit also draw out

Answer 21

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

Question 22

Solenoid

Answer 22

Makes motion with electromagnet

Led to Meter that led to motor

Question 23

Explain motors

Answer 23

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.

Question 24

Motor and generator

Answer 24

Same thing ran backwards they make electricity with mechanical energy

Question 25

Electricity

Answer 25

Electrons in motion

Also called electric current