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An invisible force that can produce heat, motion, light, and other physical effects is?
Electricity
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What convention did benjamin Franklin Suggest
Like objects repel, opposites attract
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as electrons flow through a conductor, the number of of electrons is measured by the number of coulombs per second that move pass a _____ in a circuit
fixed point
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The unit of electrical current flow is?
Ampre
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The coloumb is defined as the total charge of?
6.25 x 10^18 electrons
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The amount of current flowing through a circuit can be measured with a?
ammeter
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the thoery of current flow in which current flows from negatve to positive is?
Electron current flow
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electrical potential of one volt will cause one coulomb of current to do one ____ of work
joule
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Instrument used to measure Resistance?
Ohmeter
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Completed path for current to flow from a source of current through a load and back to the source of current?
Circuit
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when current finds and alternate path back to source, rather than taking path through load, this is called a?
short circuit
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ohms law states that it takes one volt to push one amp through
one ohm of resistance
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current flow in an electrical circuit is caused by voltage and opposed by ?
resistance
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in a circuit current is directly proportional to voltage and _______ proportional to the resistance
iversely
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the unit of measurment for power is ?
Watts
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one horse power eqauls to
746 watts
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power is consumed when voltage is apllied to a circuit and ____ flows through the load.
current
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The _____ the amount or unit of energy used to measure th amount of heat or work produced or consumed in a system
joule
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joules law is ?
the total amount of heat produced in a conductor is directly proportional to the resistance times the square of the current.
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the smallest particle to which an element can be reduced yet still retain the characteristics of a an element
atom
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3 main parts of an atom
electrons protons nuetrons
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nucleus of a atom consist of the
proton and nuetron
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which particle has a negative charge and rotates around the nuecleus of the atom
electron
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what keeps orbiting electrons from peing pulled into the nuecleus
centrifical force
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what is a conductor
a material that allows electric current to flow easily
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what is a insulator
a material that strongly resist the flow of electricity.
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how many electrons do semiconductors have in the valence shell
4
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what are the different ways to make electricity
friction, chemicals, heat, pressure, light, magnetism
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what determines the individual cell voltage of a battery
the metal being used for the plate.
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when aluminu and silver are used for a battery what metal will be the negative electrode and why?
aluminum because it will receive more electrons than silver
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name the two catogories that batteries are divided into
primary cells , secondary cells
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what type of battery cell can be recharged several times ?
Secondary
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when two dissimalar metals are joined at a junction and then heated
thermoelectricity
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a mechanical device designed to allow or interrupt current flow in a circuit
Switch
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a switch that makes or breaks one circuit path ata time is reffered to as a ?
single pole switch
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what switches are used to control a light in two locations
three way switches
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