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