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31 Cards in this Set
- Front
- Back
Who was most responsible for the practical use of electricity?
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Thomas Edison
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What can rubber, glass, and plastic all be used as?
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insulators
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When a loop of wires is rotated through a magnetic field, what do we create that is useful?
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electricity
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Which material is the best electrical conductor?
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copper
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Sometimes socks cling to shirts when removed from the clothes dryer. What causes this?
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static electricity
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What is needed to move electricity along wires?
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Volts or voltage
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Which of the following can you pick up with a magnet?
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most metal objects
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Electrons have a _____ charge.
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negative
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If two charged balloons move away from each other, they have _____.
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the same charge
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Protons have a _____ charge.
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positive
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Electrons in a battery flow from
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negative to positive
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Where can electrons be found?
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orbiting around the nucleus of an atom
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What type of electricity is created when you rub your feet on the carpet?
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static
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Resistance measures how well electicity _____.
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travels through matter
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Electrons moving through a wire is called _____.
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electric current
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The number of electrons moving through a wire at one time is called _____.
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amperes
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Voltage is
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the force of the electrons moving through the wire.
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A switch is used in a circuit to
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open or close the flow of electrons.
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Inside atoms you will only find _____.
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protons, nuetrons and electrons
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Inside a magnet the atoms _____.
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are all lined up in the same direction.
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What metals can be permenantly magnetized?
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cobalt, iron, nickel
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If you drop a magnet, you can _____.
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mix up the neat rows of atoms making the magnet weaker.
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Why can't you pick up plastic with a magnet?
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insulators, like glass and plastic, have few free electrons.
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What is invisible around a magnet?
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magnetic field
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Lightning is a form of what kind of electricity?
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static
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A _____ must be closed so electrons can flow through a circuit.
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switch
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A magnet made when an electic current flows through a wire is an _____.
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electromagnet
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What kind of circuit would you need to have one light bulb on and one light bulb off at the same time?
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parallel
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Which poles of two magnets attract each other?
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opposite
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What kind of circuit allows a current to flow through it?
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closed
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Rubbing a magnet along a steel needle can make the needle _____.
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a magnet
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