POTPOURRI
The -1 and +1 of the corresponding subatomic particles is actually this many Coulombs.
1.6 x 10-19
Charging by contact.
CONDUCTION
Material that permits electrons to flow freely from particle to particle.
CONDUCTOR
quantity of charge variable
Q
Directions of both electric field line types.
TOWARDS NEGATIVE
AWAY FROM POSITIVE
Two like-charged balloons experience a repulsive force of 0.320 N. If the distance is decreased by a factor of 3 and the charge on one of the balloons is doubled, the new repulsive force would be...?
5.76 N
(force increases 9X [32] and then doubles from increasing force by 2)
Electric force falls under this category.
NON-CONTACT
Naturally occurring electrostatic discharge.
LIGHTNING
Structural mounting that provides protection from excess charge.
LIGHTNING ROD
unit of distance
METERS
Lines always go towards and come from…
INFINITY
A neutral object gains 1.5 x 106 protons. What will its new charge be?
NOT A VALID QUESTION
Identify what two things will attract a negatively charged object.
POSITIVELY CHARGED OBJECT
NEUTRAL OBJECT
Non-contact method of instigating charge.
Material that impedes the free flow of electrons from atom to atom and molecule to molecule.
INSULATOR
symbol for proportionality constant
k
What lines will never do.
CROSS EACH OTHER
Two balloons are charged with an identical quantity and type of charge: -6.25 nC. They are held apart at a distance of 67.1 cm. Determine the magnitude of electrical force of repulsion between them.
7.81 x 10-7 N
(9E9)(6.25E-9 C)^2/(.671 m)^2
Order of substances by electron affinity.
TRIBOELECTRIC SERIES
Separation of charge into opposite ends.
POLARIZATION
Large object that serves as a resource of electrons or destination for them.
GROUND
Equation that most closely resembles the electric force equation.
FORCE OF GRAVITY
Tend to be strongest at physical locations where the ______ is greatest.
CURVATURE
A 1 gram balloon with a charge of -105 nC is located 15 cm above a plastic golf tube that has a -85 nC charge. Determine the net force acting on the balloon.
0.00623 N, down
(Fgrav = .001 kg * 9.8)
(9E9 X 105E-9 X 85 E-9) / .15^2 = .00357 N, up
-.0098 + 0.00357 = .00623 down
Coulomb’s Law states that the electrical force between two charged objects is ____ proportional to the product of the quantity of charge on the objects and _____ proportional to the square of the separation distance between the two objects.
DIRECTLY; INVERSELY
Enclosure used to block electromagnetic fields.
FARADAY CAGE
Electric field lines are based on electric force _____.
VECTORS
electric field strength equation
FORCE / CHARGE
F / q
Condition established by charged conductors in which the excess charge has optimally distanced itself so as to reduce the total amount of repulsive forces.
ELECTROSTATIC EQUILIBRIUM
At a location of 0.200 m from object A, the electric field strength is 0.0500 N/C. If the electric field strength were measured using a test charge with three times the charge at a location of 0.100 m from object A, then the electric field strength would be...?
0.200 N/C
(amount of test charge does not matter, halving distance increases electric field strength by 4)