# Electricity

 what do volts measure? resistance what do joules measure? energy what do watts measure? power what do amperes measure? current what do ohms measure? resistance what is voltage? potential difference 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? insulators 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 This theory is outdated what is Ohm's law? V=IR 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. current electricity the continuous flow of charge in a complete circuit. Moving charge (not static) electric current the amount of charge passing a point in a conductor every second power the rate of change in energy power rating 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. power formula P=VI energy consumption 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? 3600 seconds 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 series: stays the same throughout.parallel: divides amongst the pathways. The current is the same in every junction. Voltage: series circuit VS parallel circuit series: each load loses a portion of total voltage. All voltage that enters is lost.parallel: same throughout. the voltage in each path is the same. Resistance: series circuit VS parallel circuit series: total resistance increases when resistors are placed.parallel: adding resistors in parallel circuits decreases resistance. Authorkamcdonald ID219848 Card SetElectricity Descriptionscience stuff Updated2013-05-16T05:23:09Z Show Answers