# Shared Flashcard Set

## Details

Electric Fields and forces
see above
23
Physics
04/14/2008

Term
 What are the two types of charges?
Definition
 Negative + Positive
Term
 like charges = ?
Definition
 repel ("like dislike")
Term
 opposite charges = ?
Definition
 attract ("Opposites attract")
Term
 Electric Charge is always _______ -Give example
Definition
 Conserved -Loss of electrons by hair is equal to the amount gained by the balloon -cannot create or destroy charge
Term
 Millikan
Definition
 The person who performed the oil drop experiment.
Term
 Oil Drop Experiment
Definition
 Millikan used negatively charged oil droplets and let them go through a tiny hole in a metal plate. Millikan then charged the plate in the above the drop, causing it to become attracted towards it. By repeatedly doing this, he could make the oil drop "dance" and be suspended in midair. As a result he was able to calculate the charge on an electron.
Term
 e
Definition
 the charge on an electron
Term
 the charge on an electron
Definition
 -1.60x10^-19 C
Term
 Unit of electric charge
Definition
 Coulomb (C)
Term
 The force electric is affected by 2 things, what are they?
Definition
 -The magnitude of the charge-The distance between the particles
Term
 field force
Definition
 a charged particle's region of influence
Term
 examples of field forces include...
Definition
 gravity and the force electric
Term
 Similarities and differences between gravity and the force electric.
Definition
 Fg can only be positive and is weaker.Fe can be positive or negative and is stronger
Term
 insulator
Definition
 does not conduct a charge
Term
 conductor
Definition
 conducts a charge
Term
 electric field
Definition
 a region where an electric force on a test charge can be detected
Term
 Induction
Definition
 the process of charging a conductor by bringing it near another charged object and grounding the conductor
Term
 An object can be charged by... (3 ways)
Definition
 -contact-induction-polarization
Term
 Polarization
Definition
 -occurs with insulators-involves a realignment of charge-no net charge
Term
 a positively charged particle has an _____ directed field
Definition
 outwardly
Term
 a negatively charged particle has an _____ directed field
Definition
 inwardly
Term
 the three things to remember about electrostatic equilibrium are...
Definition
 -the electric field is zero everywhere inside the conductor-the electric field is perpendicular to the conductor's surface-on an irregularly shaped conductor, charge tends to accumulate where the radius of curvature of the surface is the smallest (at sharp points)
Term
 electrostatic equilibrium
Definition
 no net motion of charge is occurring within a conductor
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