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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 http://www.regentsprep.org/Regents/physics/phys03/aeleclab/default.htm FRICTION CONDUCTION INDUCTION 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?