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50 Cards in this Set
- Front
- Back
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How did the Greeks discover electricity?
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By rubbing amber with fur and creating a spark.
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Who invented the light bulb?
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Thomas Edison
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Rubbing two objects together creates what?
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Static Electricity
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What occurs when electrical charges build up on the surface of an object?
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Static Electricity
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Charged objects with like charges...
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repel.
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Charged objects with unlike charges...
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attract.
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Lightning is...
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static electricity.
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In order for electrical energy to be useful..
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it must have a continuous flow of electrons.
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The flow of electricty around a circuit is...
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current electricity.
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A continuous unbroken path
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circuit
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A material that allows electricity to flow through it easily...
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conductor.
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A good conductor...
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metals.
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A conductor that can be moved to bridge a gap in a circuit..
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switch.
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Material that reduces the flow of electrons...
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resistor.
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A material that doesn't allow electrons to flow such as plastic, wood, or glass...
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insulator
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A circuit with only one path...
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series circuit.
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The filament of a light bulb is a...
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resistor.
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A circuit with multiple paths...
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parallel circuit.
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The measure of the amount of electrical push or force in a circuit...
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volt.
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Measure of power or how fast work is done...
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watt.
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1kW =
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1,000 watts
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The unit used to measure how much current flows through a given part of a circuit in one second...
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ampere
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Watts divided by volts =
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amps
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A liquid or paste that conducts electricity...
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eletrolyte
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What is needed to make a electric cell?
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Two different metals and an elctrolyte connected with wires.
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What is different about a dry cell and a wet cell?
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The wet cell uses a liquid electrolyte and the dry cell uses a paste electrolyte.
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An ocean animal that uses electricity...
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electric ray.
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These electric cells are rechargeable...
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wet cells.
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Electrons leave the ______ side of the battery and travel to the ______ side.
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negative
positive |
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Name a machine that uses a wet cell battery...
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a car.
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A material that has the ability to attract iron..
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a magnet.
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The area of magnetic force...
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magnetic field.
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He discovered that current traveling through a wire produces a weak magnetic field.
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Hans Christian Oersted
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Two scientists who discovered that moving a magnet around or through a loop of wire produces electricity in the wire.
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Henry and Faraday
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A __________ uses a magnet to convert motion into electrical energy.
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generator
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He discovered that adding a metal core to a coil of wire increases the magnetism.
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Sturgeon
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A coil of wire with a core attached to an electrical source.
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Electromagnet
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The magnetic force is strongest at the _____ of the magnet.
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ends
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What is one way magnets and static electricity are the same?
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Can attract and repel other objects.
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An object with blades that is used to power a generator...
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turbine
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An object that uses electricity...
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electrical devices
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An object that uses electricity to communicate information...
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electronic device
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An electric current that carries information...
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Electrical signal
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In the binary number system, what number represents an open circuit?
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0
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A small circuit with all of its parts built into it...
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An integrated circuit (IC)
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Another name for a integrated circuit...
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microchip
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Integrated circuits signal information by..
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opening and closing circuits in sequence.
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The brain of a computer...
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CPU - Central Processing Unit
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Built in memory of a computer...
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ROM - Read only memory
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Memory that is temporarily stored and is deleted when you turn off the computer...
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RAM - Random Access Memory
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