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31 Cards in this Set
- Front
- Back
To fill space between metal plates, add a __________
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dielectric insulator
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dielectric constant (k)
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reduces voltage
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Ground the positive column __________
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doesn't allow for sparking
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If you have charge on each side, it will come to a point when the battery is ____ charged
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fully
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Ne
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total number of electrons transferred
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All electrons begin moving once the _____ is ________.
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switch; closed
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Signal time
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the time it takes for the electrons to begin movement
- travels almost at the speed of light |
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Ohm's Law
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V= I * R
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Capatance and battery
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if battery loses power, it is shown through capatance
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Vd
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drift speed
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When no battery connected
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electrons still exhibit fast random motion
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Electron current
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the direction of the electrons
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conventional current
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the direction of the electric field
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Direct current
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The electrons are flowing in the same direction
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Alternating current
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forces electrons to go different directions when current changes directions
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Voltmeter reading guide:
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The slope tells the unknown voltage
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The size of a resistor determines its ___________
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power rating
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power rating
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how much energy per second a resistor can handle without melting or exploding
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Where are adjustable resistors used?
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Used in volume control on TV's/radios or in contrast in computer screen.
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Compare A'=2A
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R'=R/2
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compare L'=2L
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R'=2R
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Compare p = 2p
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R'=2R
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Where does charge come from when traveling to the wire?
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capacitor
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In a circuit, the ______ is the same in all places.
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current (I)
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think of switch as having an ________ between it when open
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insulator
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debris analogy (resistance)
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- if we take debris out, we'll have more flow
- If we put even more debris in, we'll slow down the flow rate |
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What is Vbc when the R is missing
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there will not be a voltage or conventional current
- Remember voltage between the two points will still be "X" |
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Ideal battery doesn't have ________
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resistance
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Paying electric company
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they supply the watts (not power).
W = Pt |
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Power is always going to be _____
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positive
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AC means that the light bulb is constantly....
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going on and off.
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