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Ch 33 Physics EA
Chapter 33
Term | Definition |
---|---|
electric field | a force field that fills the space around every electric charge or group of charges. |
field lines | vectors that describe the electrified web of space that will draw and repel other charges which it enters. |
electrical potential energy | energy a charge has due to its location in an electric field; |
electric potential | electric potential energy per coulomb at a location in an electric field; measured by volts and often called voltage |
volt | si unit of electric potential one volt is the electrical potential difference across which one coulomb of charge gains or loses one joule of energy |
voltage | electric potential; measure in volts. and potential difference. |
potential difference | the difference in electric potential between two points. free charges flow. |
electric current | the flow of electric charge, measured in amperes. |
voltage source | a device, such as a battery or generator, that provides a potential difference |
electric resistance | the resistance of a material to the flow electric current through without resistance |
direct current | electric current whose flow of charge is in one direction |
alternating current | electric current that repeatedly reverses direction, twice each cycle, 60 cycles per second. |
a force field that surrounds an electric charge or group of charges | electric field |
an electric field has both magnitude and | direction |
the concept of electrical potential energy per charge that has a special same | electric potential |
the SI unit of measurement for electrical potential | volt |
the name for electric potential measured in volts | voltage |
the energy a charge has due to its location is an electric filed | electrical potential energy |
this happens when there is a difference between the conductors which prevents charge flow | Potential Difference |
the flow of electric charge | electric current |
work | is done when a force moves something in the direction of the force |
there is no way to shield___ because it only attracts | gravity |
how can you shield an electric field? | surround the object with a conducting surface |
a volt is equal to | is equal to one joule/coulomb |
weaker test charge means | smaller field |
an electric field has both | magnitude and direction |
gravitational field | a force field that surrounds a mass |
acting at a distance | the contact between objects in an electric and gravitational field |
positive test charge | the direction of an electric field at any point is the direction of this |
vector quantity | has magnitude and direction, represented by vectors |
vectors | lines with arrows to show strength and direction of the field lines |