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CHAPTER 1 ELECTRICITY
The amount of charge flowing past a point in a given time CURRENT
The closed path for electrons to flow CIRCUIT
The unit used to measure current AMPS
A ________ _________ protects your home from circuit overloads Circuit breaker
List 3 ways to produce static electricity FRICTION CONDUCTION INDUCTION http://www.regentsprep.org/Regents/physics/phys03/aeleclab/default.htm
Like charges will _______ each other and opposites will _____________ REPEL ATTRACT
The electricity from the outlets is ______________ current and has a voltage of _____ ALTERNATING 120 VOLTS
The largest example of electric discharge LIGHTNING!
_________ allow electrons to flow freely through them. CONDUCTORS
Heating elements contain metals of ____________ resistance HIGH!!
_________ can hold a static charge but do not allow the flow of electrons. INSULATORS
Copper is used in electrical wiring because It is a conductor with LOW resistance.
In this circuit, ________ energy is converted to electrical energy. CHEMICAL
Increasing resistance will ___________ the current. DECREASE
List 4 ways to reduce resistance in a conductor. Shorten the wire Use a good conductor Make the wire thicker Reduce the temperature of the wire
If voltage increases, what happenS to the current? IT INCREASES!!
In the case of Lightning, _________ energy is converted to heat, light and sound ELECTRICAL
Electric power is measured in WATTS OR KILOWATTS
Potential difference is measured in VOLTS
The source of potential difference in a circuit BATTERY
If the voltage in a circuit is 20 and the resistance is 5, what is the current in amps? 4 amps
Why in a parallel circuit do the bulbs stay lit even if one goes out? Each has its own path for electrons to flow
Describe the flow of energy through a circuit. Chemical reactions in electrolyte push electrons out of the battery, through the conductor, to the load and back to the battery.
How does the VanDegraaf generator work??
Why can you make a balloon stick to a wall?
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