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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.
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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
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
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.