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Electricity
N/A
24
Physics
9th Grade
06/02/2009

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Cards

Term
Electric Potential Difference
Definition
a product of the resistance between 2 points and the current blowing between the two points
Term
Voltage
Definition
the potential energy compared with the quantity of charge
Term
Electric Potential
Definition
aka voltage. the potential at a point a distance from a charge
Term
Electric Potential Energy
Definition
depends on location of charge in an electric field
Term
Primary Function of Battery
Definition
to push the electrons through the circuit
Term
Energy Transformations Of Battery & Light Bulb
Definition
chemical -> light/electric
Term
Current
Definition
flow of electrons
Term
Conventional Current
Definition
when the direction of flow is from positive to negative
Term
Resistance
Definition
factors that affect the flow of charged particles
Term
Power
Definition
*rate at which energy is changed from one form to another. *rate at which work is done.
Term
Charge [symbol & unit]
Definition
Q & coulumbs
Term
Current [symbol & unit]
Definition
I & amperes
Term
Electric Potential [symbol & unit]
Definition
EP & volts
Term
Voltage [symbol & unit]
Definition
V & volts
Term
Energy [symbol & unit]
Definition
E & joules
Term
Power [symbol & unit]
Definition
P & watts
Term
Resitance [symbol & unit]
Definition
*ohms* & ohms
Term
Ohm's Law
Definition
current through a circuit varies directly with the voltage ACROSS the circuit and inversely with the resistance IN the circuit
Term
4 Factors That Affect Resistance & If They Increase/Decrease
Definition
Width : greater width, lower resistance
Length: greater length, higher resistance
Make-Up Of Material
Temperature: greater temperature, higher resistance
Term
Why Is A Series A Voltage Divider?
Definition
the voltage [potential energy compared w/ charge] gets split into the different resistors
Term
Why Is A Parallel A Current Divider?
Definition
the current gets split into the different wires
Term
Increase In Resistors In Series for a) total resistance, b) total current, c) power supplied by battery
Definition
a) increases b) decreases c) decreases
Term
Increase In Resistors In Parallel for a) total resistance, b) total current, c) power supplied by battery
Definition
a) decreases b) increases c) increases
Term
AC vs DC curent
Definition
DC : current made of e that flow in one direction. AC : current when e in circuit flow initially in one direction then in opp direction
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