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Definition
| voltage; difference between magnitude of charges |
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| chemical reaction in battery |
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Definition
| produces electron on the anode; releases charge and the potential difference between the terminals allows the charge to flow |
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| when chemical reactions on a battery stop |
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Definition
| when its not hooked up to anything because there's too many electrons |
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| why negative charges in the battery don't move through the battery to the positive terminal |
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Definition
| some electrons do but most don't because the internal resistrance caused by the materials in the battery is very high |
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| path that electrons in an electric field take |
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Definition
| the path of least resistance |
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Term
| when a copper wire is placed between the terminals of a battery... |
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Definition
| the electrons will readily flow through the metal conductor because its the path of least resistance |
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Definition
| continuous path from the negative terminal (anode) to the positive terminal (cathode) |
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Term
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Definition
| continuous flow of electrons in a circuit |
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Term
| electric current in a wire is... |
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Definition
| the net amount of charge that passes through a wires' cross sectional area over an interval of time |
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Term
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Definition
| I=change in charge divided by change in time |
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Definition
| named after French physicist Andre Ampere |
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Definition
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Definition
| device that produces a potential difference by chemical reactions |
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| as the current flows through the wire... |
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Definition
| the electrons ineract with each other and the atoms in the metal |
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Term
| collisions with electrons and atoms... |
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Definition
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Term
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Definition
| offer different resistances because of the density of the material and the size of the atoms |
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Term
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Definition
| what value of resistance is measured in |
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Term
| if something is less dense, the collisions... |
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Definition
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Term
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Definition
| when the current moves in one direction |
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Term
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Definition
| when the current flows back and forth |
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| what changes in the physical properties of the wire will do |
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Definition
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Term
| what happens when you increase the thickness of the wire |
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Definition
| it allows electrons to have more paths to take, decreasing the resistance |
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Term
| what happens when you extend the length in the wire |
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Definition
| the potential difference has to act over a longer distance, there are more intervening atoms, number of collisions increase, and resistance increase |
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Term
| what happens when you increase the temperature in the wire |
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Definition
| it speeds up the motion of the atoms in the wire |
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Term
| vibration of the atoms causes... |
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Definition
| an increase in the rate of collision between the atoms and the flowing electrons, increasing resistance |
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Term
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Definition
| V = IR; current times resistance |
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Term
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Definition
| value of how much a material will slow down the charge |
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| when the breaker is tripped |
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Definition
| when too much electricity is fun the wires heat up and are shut off to prevent overheating |
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