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21 Cards in this Set
- Front
- Back
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Laws of static charge |
Like charges repel Opposites attract Neutral attracted to charged |
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Insulator |
don't allow electrons to move easily charge can build up |
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Conductors |
Allow electrons to flow easily Charge can't be built up |
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Coulomb of charge (C) |
Unit of electric charge 6.25x10 to power of 18 = 1C |
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Generating static charge |
Charging object by using friction |
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Charging by friction |
Rubbing two different materials together Charge transfers |
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Charging by induction |
When charged object brought close to but doesn't touch neutral object
will repel electrons |
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Charging by conduction |
Charging neutral object by touching to charged object |
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Applications of static charge |
Saran Wrap Laser printers Decrease air pollution |
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Energy |
Ability to do work |
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Kinetic energy |
Moving object has because of its motion |
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Potential energy |
Energy stored in object |
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Potential difference |
Voltage
Amount of electric potential energy per Coloumb of charge |
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How to build a cell |
Electrodes- two metal terminals
Electrolyte-conducts electricity (Wet cell= fluid) (dry cell=paste) |
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Sources of electrical energy |
Friction Piezoelectric crystals Photo-electrochemical cells Themocouples Generators |
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Ohms law |
V=voltage (V)-volts I=current (A)-amperes R=resistance (Ω)-ohms |
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Electric current |
Amount of electrons that can pass through circuit per unit time |
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Resistance |
how difficult it is for electric current to flow through conductor
Factors that affect= Type Thickness Length Temperature |
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How to read a resistor |
1st band=first digit 2nd band=second digit 3rd band= # of zeroes 4th band=tolerance |
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Circuit diagrams |
Source
Conductor
Load=transforms electrical energy Into other energy
Switch |
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Measuring voltage and current |
Voltage=voltmeter Current=ammeter |
