Quiz 3.
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Created by:
Krystalian86 on November 13, 2009
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52 terms
Terms | Definitions |
|---|---|
 Electricity | electrons transferred from one place to another |
| conductor | allows electrons 2 flow freely |
| insulator | inhibits the flow of electrons |
| AC DC | 2 types of electricity (electron flow) |
| Direct Current (batteries) | DC stands for |
| Alternating Current (generators) | AC stands for |
| R E P I | units of measurements are |
| Ohms (resistance) | uom R stands for |
| volts | uom E stands for |
| watts | uom P stands for |
| amperes | uom I stands for |
| transformer | voltage must be reduced for us to use our electrical needs |
| voltage | (blank) must be reduced by means of transformers to a more useable level for most of our electrical needs |
| Ohms Law | I=E/R amperage=voltage/resistance |
| rate of flow | electrical potential/ resistance |
| law of charges | like charges repel unlike charges attract |
| Volts | E(EMF) |
| Volts | pressue that causes electrons to flow |
| Electrical Pressure | E=IxR rate of flow x's resistance (equation for volts) |
| amperes | measures the rate of electron flow |
| rate of flow | E/R |
| Power Formula | P=IE (w-va) |
| w=va | wattage=voltage x amperage |
| 120 | all voltage equals |
| black or red | Wire Colors hot or positive pole= |
| white | WC neutral pole= |
| green | WC ground pole= |
| single phase power | is generated at 60 cycles per sec. |
| ohms=r | a measurement of how much resistance there is to the flow of electrons |
| r=e/i | resistance=electrical pressure/rate of flow |
| i=e/r | less resistance=more amperage |
| resistance | wire coils vary resistance |
| auto transformers | vary the voltage |
| electric dimmers | low voltage SCR |
| gating principle | switches voltage on/off 120x's a second |
| 48d | 1/2 rack of Dimmers= |
| 96d | full rack of Dimmers= |
| Digital | DMX 512 |
| Analog | AMX 192 standard analog. signal |
| control boards | manual preset computers |
| sources of power | battery(1200volts) generator(6000 600volts) transformer(120volts) |
| NEC | National Electric Code |
| circuits | series parallel |
| AC Sine Curve | the alternating current sine curve created by an AC generator |
| 3 Phase Sine Curves | the overlapping sine curves produced by an AC generator with 3 armatures at 120 degrees to one another. |
| patching | slider panels(manual) plug panels(manual) dimmer per circuit(electronic patch) |
| control boards | manual preset computer |
| single phase | 2H 1N |
| 3 phase | 3H 1N |
| 20 amps | how much amps is in each dimmer? |
| current increases | as voltage increases |
| current decreases | as resistance increases |
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