ch17_ccrm

=Chapter 17: = -Positive and negative charges are opposite -When the electrons in an atom are balanced by an equal number of protons, the atom has no net charge. -Milikan's oil drop experiment: determined that charge occurs as discrete amounts in matter. -Conductors: transfer charge easily (ex: metals) -insulators: do not transfer charge easily -insulators and conductors can be charged by contact conductors can be charged by induction -Induction: the process of charging a conductor by bringing it near another charged object -Polarization: centers of neutral atoms or molecules may shift so that one side is more charged than the other
 * __Section 17.1__**
 * = Particle ||= Charge (c) ||= Mass (kg) ||
 * = e- ||= -1.60x10^-19 ||= 9.109x10^-31 ||
 * = p+ ||= 1.60x10^19 ||= 1.673x10^-27 ||
 * = n ||= 0 ||= 1.675x10^-27 ||

-The closer 2 objects are, the greater the force is between them -If a charge is doubled, electric force doubles -Distance between 2 objects is halved if force is 4x math Felectric=\frac{1}{distance^2} math math Felectric: kc\frac{q1q2}{r2} math
 * __Section 17.2:__**
 * Coulomb's law:**

math Kc=8.99x10^9\frac{Nm^2}{C^2} math -Felectric is much stronger than Fgravitational -Resultant force on a charge is the vector sum of the individual forces on that charge

-Electric Field: a region in space around a charged object in which stationary charged object experiences an electric force b/c of its charge. math E: \frac{Felectric}{q} math -Electric field strength depends on charge and distance //Magnitude:// math Fe=Kc\frac{qq0}{r^2} math //Strength:// math E=\frac{Fe}{q0}=Kc\frac{q}{r^2} math -Electric Charge from a point charge is: math E=Kc\frac{q}{r^2} math if q is positive, the field lines due to this charge is directed outward radially from q -Rules for drawing electric field lines: 1. same direction 2. Number of lines leaving is proportional to the magnitude of charge 3. No 2 field lines can cross each other //-//Conductors in electrostatic equlibrium: 1.electric field is zero everywhere inside conductor 2.any excess charge on an isolted conductor reticles entirely on conducctor's outersurface 3.electric field just outside
 * __Section 17.3__:**

"Chapter 17: Electric Forces and Fields." __Holt Online Learning__. 5 June 2009 .