Term

Definition
entity that defies definition; is measured in units of coulombs (C); 


Term

Definition
unit of measurement used to quantitatively describe a charge 


Term
Universal Law of Conservation of Charge 

Definition
The universe has no net charge; net charge is created by separating electrons from protons. 


Term

Definition
smallest unit of charge; e = 1.6x10^19 C 


Term

Definition
Opp. charges attract each other; like charges repel each other. 


Term

Definition
Describes the magnitude of repulsive/attractive forces between two charged objects; F = k(q1q2/r^2) 


Term

Definition
originating point on an object from which a charge is generated 


Term

Definition
manmade concept designed to explain action at a distance 


Term

Definition
used to represent fields; lof point in the direction of the field (e fields: + > ; g fields: > mass creating the field) 


Term

Definition
electrostatic force per unit charge; units are given as N/C or V/m. 


Term
Eqtn for electric field of a point charge 

Definition


Term
Eqtn for force (F) on a charge (q) in an electric field (E) 

Definition


Term
Eqtn for potential energy (U) of a charge in an electric field 

Definition
U = Eqd (notice similarity to gravitational PE  U = mgh) 


Term

Definition
the potential for work by an electric field in moving any charge from one point to another; V = Ed; units = volts (V)  J/C 


Term

Definition
unit of measurement used to define voltage; can be expressed as J/C 


Term
Eqtn for voltage due to a point charge 

Definition


Term

Definition
surfaces normal to an electric field that describe a set of points all with the same potential (V) 


Term

Definition
created by two opp. charges with equal magnitude 


Term
Electric dipole moment (p = qd) 

Definition
a vector whose magnitude is the charge q on one of the charges times the distance between the charges 


Term
Review of eqtns for an electric field created by a point charge 

Definition
Eqtn Units F = k(q1q2/r^2) N E = k(q1/r^2) N/C or V/m U = k(q1q2/r) J V = k(q1/r) 


Term

Definition
allow e's to flow relatively freely (i.e. metals) 


Term

Definition
(poor conductors) hold e's tightly in place and impede free flow of e's (i.e. network solids such as diamonds and glass) 


Term

Definition
method of charging a conductor by moving ly charged objects close to electrically insulated conductors 


Term

Definition
flow of moving charges; given in amps (A) or C/s 


Term

Definition
unit of measurement used to describe current; also given as C/s 


Term

Definition
cyclical pathway for moving charge 


Term

Definition
quantitative measure of a substance's resistance to flow of charge 


Term

Definition
quantitative measure of an object of a particular shape and size to resist the flow of charge; measured in ohms 


Term

Definition
measurement used to describe an object's resistance 


Term
Eqtn for a material's resistivity 

Definition
R = p(rho)x(L/A); where L = length and A = area 


Term

Definition
eqtn that relates voltage (V), current (i), and resistance (R: V = iR 


Term

Definition
the amount of current flowing into any node (intersection of wires) must be the same amount that flows out 


Term

Definition
the voltage around any path in a circuit must sum to 0 


Term
Electromotive force (EMF) 

Definition
means of rating batteries; not a true force, simply a fancy word for voltage 


Term

Definition
used to temporarily store energy in a circuit; E is stored in the form of separated charge 


Term

Definition
two plates, made from conductive material, that are separated by a very small distance; on a charged capacitor: one plate holds + charge while the other wholes the same amount of  charge 


Term

Definition
ability to store charge per unit voltage; C = Q/V 


Term
Eqtns for the energy (U) stored in any shape capacitor 

Definition
U = 1/2QV or (others derived from C = Q/V) U = 1/2CV^2 or U = 1/2Q^2/C 


Term

Definition
refers to substance between the plates of a capacitor (must be an insulator); resists the creation of an electric field, thus allowing the capacitor to store more energy 


Term
Relation between voltage and time as defined by batteries (charging/discharging) 

Definition
Charging: V increases with time Discharging: V decreases with time 


Term
Eqtns for resistance and capacitance in circuits (series & parallel) 

Definition
Resistance: eff = Total Reff = R1 + R2 +... (series) 1/Reff = 1/R1 + 1/R2 +... (parallel)
Capacitance: Ceff = C1 + C2 +... (parallel) 1/Ceff = 1/C1 + 1/C2 +... (series) 


Term

Definition
rate of energy transfer; electrical power eqtns: P = iV; P = i^2R; P = V^2/R 


Term

Definition
Concept often used to integrate electricity and mechanics into the same question 


Term

Definition
rate at which heat is generated as current goes through a resistor 


Term
Direct current (DC current) 

Definition
net movement of e's is in one direction around a circuit 


Term
Alternating current (AC current) 

Definition
created by oscillating e's back and forth in SHM; commonly used in home outlets in the U.S. 


Term
Voltage and Current for AC current 

Definition
described as sine waves; max current occurs at max velocity; eqtns: Vmax = sqrt2xVrms; imax = sqrt2xirms 


Term

Definition
unit of measurement used to describe magnetic field strenth 


Term
Changing electric fields create magnetic fields; stationary charges do not create magnetic fields 

Definition


Term
Force (experienced by a charge moving through a magnetic field) 

Definition
Force (F) on a charge (q) moving with velocity (v) through a magnetic field (B) is: F = qvBsin(theta) 


Term
Force (experienced by a charge moving through a magnetic field) 

Definition
Force (F) on a charge (q) moving with velocity (v) through a magnetic field (B) is: F = qvBsin(theta) theta = angle b/t mag field and charge velocity 


Term
Direction of force (experienced by a charge moving through a magnetic field) 

Definition
the force is directed perpendicularly to both velocity and the mag. field 


Term
Changing magnetic fields create electric fields 

Definition


Term
Describe the source and flow of energy in situations in which electrical fields are induced 

Definition
Mechanical E is transferred to internal E because the forces due to induced e fields are nonconservative 


Term
Moving charges, magnetic fields, and forces 

Definition
A moving charge generates a mag field; when moving through a mag field, a moving charge experiences force 

