Chapter 22: Electrostatics Flashcards
Which force binds atoms together to form molecules?
electrical
In an electrically neutral atom the number of protons in the nucleus is equal to the number of
electrons that surround the nucleus.
Strip electrons from an atom and the atom becomes a
positive ion.
The unit of electric charge, the coulomb, is the charge on
a specific large number of electrons.
A transistor is an example of a
semiconductor.
Induction is when
you bring a charged object near another object and cause a movement of charge.
Paper plates don’t heat in a microwave because
paper contains no polar molecules.
The force between two charged particles depends
on the amount of charge on the two particles and their distance from each other.
When a material has no electrical resistance it is
a superconductor.
A volt is defined as
a joule per coulomb.
General term for electrical phenomena
Electricity
The study of electric charge at rest (def)?
Electrostatics
Electric charge is neither created nor destroyed. The total charge before an interaction equals the total charge after (def)?
Conservation of charge
The relationship between electrical force, charge, and distance (def)?
Coulomb’s law
F = k(q1*q2/d^2)
In regard to Coulomb’s law, if the charges are alike in sign, the force is
repulsive.
In regard to Coulomb’s law, if the charges are unlike (opposite), the force is
attractive.
The SI unit of electrical charge?
Coulomb
One coulomb (symbol C) is equal to
the total charge of 6.25 x 10^18 electrons.
Any material having free shared particles that easily flow through it when an electric force acts on them?
Conductor
A material without free charged particles and through which charge does not easily flow?
Insulator
A material with properties that fall between a conductor and an insulator and whose resistance can be affected by adding impurities?
Semiconductor
A material that is a perfect conductor with zero resistance to the flow of electric charge?
Superconductor
Transfer of electric charge between objects by rubbing or simple touching?
Charging by contact
Redistribution of electric charges in and on objects caused by the electrical influence of a charged object close by but not in contact?
Charging by induction
Term applied to an atom or molecule in which the charges are aligned so that one side has a slight excess of positive charge and the other side a slight excess of negative charge?
Electrically polarized
One side of the atom or molecule is induced into becoming more negative or positive than the opposite side.