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25 Cards in this Set
- Front
- Back
WHAT IS THE FUNCTION OF A CIRCUIT BREAKER BOX?
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to protect against a fire caused by overloading circuits.
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WHAT DETERMINES THE AMOUNT OF ENERGY AN APPLIANCE USES?
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it's power rating and the number of circuits in your home.
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NAME ONE USE FOR A MATERIAL WITH HIGH RESISTANCE
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a filament in a lightbulb
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WHAT IS THE FUNCTION OF THE CARBON ROD THAT RUNS DOWN THE CENTER OF A DRY CELL?
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the chemical reaction
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WHAT CAUSES AREAS OF POSTIVE AND NEGATIVE CHARGES TO BUILD UP IN CLOUDS?
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friction from movement of water droplets.
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WHAT DOES AN ELECTROSCOPE DETECT?
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electric charges
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WHAT OBSERVATION ABUT CURRENT IN A METAL CONDUCTOR WAS THE BASIS FOR O'HMS LAW?
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current depends on resistance and potential difference.
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EXAMPLE OF A GOOD INSULATOR-
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wood
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NAME ONE THING THAT IS NECESSARY TO KEEP CURRENT FLOWING?
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an unbroken path for electrons to follow.
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WHAT IS ONE REASON SOME PEOPLE THINK LIGHTNING FIRES SHOULD BE ALLOWED TO BURN?
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fires are an important part of nature's cycle.
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EXPLAIN WHY A WHOLE STRING OF CHRISTMAS LIGHTS MAY NOT WORK IF ONE BULB BURNS OUT.
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the lights are wired together in a series circuit.
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WHICH DIRECTION DO ELECTRONS FLO?
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from objects with higher potential energy to those with lower potential energy.
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CONNECTING A CHARGED OBJECT TO EARTH IN ORDER TO DISCHARGE THE OBJECT INTO EARTH IS CALLED -
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grjounding
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WHICH WIRES HAVE THE LEAST AMOUNT OF ELECTRICAL RESISTANCE? long, fiberglass, hot or thick?
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thick
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AS THE DISTANCE FROM A CHARGED PARTICLE INCREASES, THE STRENGTH OF THE ELECTRIC FIELD---
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decreases
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STATIC ELECTRICITY
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the net accumulation of electric charges on an object
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THE DIFFERENCE IN ENERGY CARRIED BY ELECTRONS AT DIFFERENT POINTS IN A CIRCUIT WILL DETERMINE THE -
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voltage
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HOW DOES AN ELECTRON EXERT A FORCE ON ANOTHER CHARGED PARTICLE?
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by interacting with the particle's electric field.
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ELECTRICAL ENERGY IS MEASURED IN -
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kilowatt-hours
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THE DIFFERENCE IN POTENTIAL ENERGY PER CHARGE BETWEEN TWO ELECTRODES IS MEASURED IN-
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volts
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WHAT IS THE DIFFERENC BETWEEN A CONDUCTOR AND AN INSULATOR?
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a conductor allows electrons to move easily through it; an insulator does not.
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WHAT DO YOU NEED TO KNOW TO CALCULATE THE ELECTRICAL POWER USAGE FOR AN AN APPLIANCE?
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the valuses of the current and voltage
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RESISTANCE IN AN ELECTRICAL WIRE CAUSES ELECTRICAL ENERGY TO BE CONVERTED TO -
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thermal energy
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WHEN 2 NEGATIVE CHARGES COME CLOSE TOGETHER THEY WILL----
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repel
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WHEN DOES AN OBJECT BECOME POSITIVLEY CHARGED?
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when it loses electrons
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