science Flashcards
electricity
flow of electrons
ampere
a unit of electrical flow
volt
a unit of electrical pressure that pushes the electrons along
ohm
unit of resistance to the current flow
finish sentence: it takes one volt of…
it takes one volt of electricity overcome one ohm of resistance in order for one ampere to flow
watt
a unit of electrical power. combination of volts (pressure) times amperes (flow) equals power (watts)
kilowatt
1,000 watts
megawatt
1,000,000 watts
what does kilowatt hour measure
measures how much electrical power is used over a given period of time
power formula
work/time
work formula
force x distance
parts of an electric circuit
energy source
electrical conductor
load
open and closed circuits
open circuit does not allow electrical current to flow while closed does
series vs. parallel circuit
series circuits only have one path they can take while in parallel circuits the electrical charges have more than one path to follow
insulator
limits electrical charges
electrical current
rate of flow of electrical charges
voltage
amount of work required to move each unit of charge between two points
resistances relationship to electrical current
opposition to flow of electrical charge equals
- voltage/current= resistance
resistance
opposition of flow to electrical charges
