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30 Cards in this Set
- Front
- Back
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Electricity- a form of energy that produces light, heat, magnetic and chemical changes.
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Electrons - tiny, negatively charged particles
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Current- Flow of electrons along a path called a conductor
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Loads- Electrically powered appliances
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Conductor- Material that best transports electricity
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Insulator- Material that does not allow current to pass through it
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AMP- Strength/ Rating of electrons flowing on a line
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VOLT- Pressure/ how hard electrons are pushed by the source.
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OHM- Resistance/ how difficult it is to push electrons through a conductor
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Watt- Amount Used/ 1 watt+ small amount of energy.
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Hertz- Frequency of number of cycles, per sec, a generator alternates current.
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Direct Current (DC)- Electrons move at an even rate in only one direction
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Alternating Current (AC)- Electrons flow first in one direction and then the other
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Converter- Changes direct current to alternating current
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Rectifier- Changes alternating current to direct current
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Source- provides the fore to move electrons through the conducting material
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Circuit- Closed path through which electrons travel to operate an appliance
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Closed Path- path where electrons leave source and go to load.
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Open Circuit- path of electrons are broke when switched off
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Parallel Wiring- Powers several loads at once
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Series Wiring- Runs all loads at the same time
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Overload- occurs when too many appliances on one circuit are being operated at the same time; line has more current than it is designed to carry |
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Short Circuit- occurs when a foreign conductor comes in contact with wire carrying current to load
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Fuse- Safety device containing a fine metal wire that allows current to flow through it.
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Circuit breaker- reusable device that breaks the flow of current when an overload occurs
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Grounding Wire- wire in the 3-wire system running directly to the ground that protects you when operating certain kinds of appliances
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Shock- human contact with electric current
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Local Shock- Electricity passes through a small part of body
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General Shock- Electricity passes through the nervous system
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