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25 Cards in this Set

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