Electricity

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1. what do volts measure?
resistance
2. what do joules measure?
energy
3. what do watts measure?
power
4. what do amperes measure?
current
5. what do ohms measure?
resistance
6. what is voltage?
potential difference
7. what is potential energy?
energy that is stored
8. what is electric potential energy?
the stored energy in a battery that has the potential to do work when it leaves the battery
9. what is potential energy difference?
amount of electric potential energy per 1 coulomb of charge
10. how is voltage produced?
separating charge within a battery
11. what are the sources of producing electric energy?
photo-electrochemical cells, friction, piezoelectric crystals, thermocouples, generators
12. what is an electric circuit?
it is a complete pathway that allows electrons to flow
13. what materials make static charge?
insulators
14. 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 This theory is outdated
15. what is Ohm's law?
V=IR
16. what are the 2 methods for determining resistance?
using an ohmmeter or attaching an ammeter and a voltmeter then using Ohm's law
17. what is a resistor?
an electrical component with a specific resistance. It can be used to control current and potential difference.
18. current electricity
the continuous flow of charge in a complete circuit. Moving charge (not static)
19. electric current
the amount of charge passing a point in a conductor every second
20. power
the rate of change in energy
21. 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.
22. power formula
P=VI
23. energy consumption
amount of electrical energy a device consumes over a certain period of time
24. energy consumption formula
25. what does one joule equal
1j = 1 watt x 1 second
26. how many seconds are in an hour?
3600 seconds
27. 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)
28. how is the resistance calculated on the band?
1st colour: first digit. 2nd colour: second digit. 3rd colour: . 4th colour: accuracy(%).
29. Current: series circuit VS parallel circuit
• series: stays the same throughout.
• parallel: divides amongst the pathways. The current is the same in every junction.
30. 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.
31. Resistance: series circuit VS parallel circuit
• series: total resistance increases when resistors are placed.
• parallel: adding resistors in parallel circuits decreases resistance.
 Author: kamcdonald ID: 219848 Card Set: Electricity Updated: 2013-05-16 05:23:09 Tags: electricity science circuit voltage power Folders: Description: science stuff Show Answers: