Card Set Information
electricity science circuit voltage power
what do volts measure?
what do joules measure?
what do watts measure?
what do amperes measure?
what do ohms measure?
what is voltage?
what is potential energy?
energy that is stored
what is electric potential energy?
the stored energy in a battery that has the potential to do work when it leaves the battery
what is potential energy difference?
amount of electric potential energy per 1 coulomb of charge
how is voltage produced?
separating charge within a battery
what are the sources of producing electric energy?
photo-electrochemical cells, friction, piezoelectric crystals, thermocouples, generators
what is an electric circuit?
it is a complete pathway that allows electrons to flow
what materials make static charge?
what is conventional current?
Benjamin Franklin's theory that static charge is a fluid and positive charge is an excess of fluid and negative charge is a lack of fluid. This theory is outdated
what is Ohm's law?
what are the 2 methods for determining resistance?
using an ohmmeter or attaching an ammeter and a voltmeter then using Ohm's law
what is a resistor?
an electrical component with a specific resistance. It can be used to control current and potential difference.
the continuous flow of charge in a complete circuit. Moving charge (not static)
the amount of charge passing a point in a conductor every second
the rate of change in energy
amount of electrical transformed per second in a load. For example, 60 watt = potential to convert 60 joules of electrical energy into 60 joules of another kind of energy in one second.
amount of electrical energy a device consumes over a certain period of time
energy consumption formula
what does one joule equal
1j = 1 watt x 1 second
how many seconds are in an hour?
what is the acronym for the resistance band colours?
0 Baby(black) 1 Boy(brown) 2 R(red) 3 O(orange) 4 Y(yellow) 5 G(green) 6 Be(blue) 7 Violently(violet) 8 Going(grey) 9 Wacky(white)
how is the resistance calculated on the band?
1st colour: first digit. 2nd colour: second digit. 3rd colour:
. 4th colour: accuracy(%).
Current: series circuit VS parallel circuit
: stays the same throughout.
: divides amongst the pathways. The current is the same in every junction.
Voltage: series circuit VS parallel circuit
: each load loses a portion of total voltage. All voltage that enters is lost.
: same throughout. the voltage in each path is the same.
Resistance: series circuit VS parallel circuit
: total resistance increases when resistors are placed.
: adding resistors in parallel circuits decreases resistance.