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what happens when a rubber rod is rubbed with a piece of fur, giving it a negative charge?
electrons are added to the rod
when a glass rod is rubbed with silk and becomes positively charged
electrons are removed from the rod
the process of charging a conductor by bringing it near another charged object and then grounding the conductor is called
wwhich of the following is not true for both gravitational and electric forces?
a. the inverse square distance law applies
b. forves are proportional to physical properties
c. potential energy is a function of distance of seperation
d. forces are either attractive or repulses
the electric field charge just ourside a charged conductor that is in electrostatic equilibrium is
for a conductor that is electrostatic equilibrium, any excess charge
resides entirely on teh conductor's interior
if an irregularly shaped conductor is in electrostatic equilibrium, charge accumulates
evenly throughout the conductor
of a positively charged glass rod is used to charge a metal bar by induction, the charge on the bar
must be negative
which sentence best describes electrical conductors
a. they ahve low mass density
b.they have a high tensile strength
c.they have electric charges that move freely
d. they are poor heat conductors
which is most correct regarding electric insulators
a. charges within electrical insulators do not readily move
b.electrical insulators have high tensile strength
c. electric charges move freely in electrical insulators
d. they are good heat conductors
when a charged object is brought close to an uncharged body without touching it, a ** charge may result on the uncharged body. when a charged body is brought into contact with an uncharged body and then is removed a ** charge may result on the uncharged body
which is the most correct statement regarding the drawing of electric field lines
a.they always connect from one charge to another
b.they always form closed loops
c. they can start on a charge of either polarity
d. they never cross eachother
explain what happens when you vigorously rub your wool socks on a carpeted floor, touch a metal doorknob, and get a shock
electrostatic- electrons from you
describe how a non conducting material, such as paper, becomes attracted to a negatively charged object brought near it
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