unit 1 section 2 - Electricity

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What is current?
The rate of flow of charge
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What is the equation for Current involving charge and time?
I=Q/t
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What is the unit of charge?
Coulomb
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What is a coulomb?
The amount of charge that passes in 1 second when the current is 1A
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What is the drift velocity?
The average velocity of all the electrons
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What is the equation for current involving drift velocity?
I=nAvq
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What does each letter stand for in I=nAvq?
I - current, n - number of charge carries, A - cross sectional area, v - drift velocity, q - charge carried in C by each carrier
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What are the charge carriers in a metal?
Free electrons.
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Do semi conductors have more or fewer charge carriers than metals?
Fewer charge carriers
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What are the charge carriers in liquids and gasses?
Ions
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What is potential difference?
Energy converted per unit charge moved
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What is the equation for PD?
V=W/Q
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On an I/v graph, what axis are I and V on?
I is on the y and V is on the x
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What is power?
The rate of transfer of energy.
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What are the 3 power equations?
P=VI, P=V^2/R, P=I^2R
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What do add to the equation to find the total energy transferred?
add t the the end so it times by time.
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what unit do electricity companies use?
Kilo-watt hours
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what is internal resistance?
The resistance in side the battery itself.
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What is EMF?
The amount of electrical energy the battery produces for each coulomb of charge.
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Is EMF a force?
No its measured in volts.
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Other cards in this set

Card 2

Front

What is the equation for Current involving charge and time?

Back

I=Q/t

Card 3

Front

What is the unit of charge?

Back

Preview of the front of card 3

Card 4

Front

What is a coulomb?

Back

Preview of the front of card 4

Card 5

Front

What is the drift velocity?

Back

Preview of the front of card 5
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