Chapter 16 Physics Flashcards

Terms Definitions
Law of Electrostatic
Object with similar charges repel each other, opposites attract
Net deficit of electrons that a free to move
Net excess
Readily transfers electrons because molecular structure allows them to move freely
Poorly transfers electrons because they are bound tightly to orbits
Electrons from source move into substance
Electrons repel due to proximity of another charged object
Measure of charge (Q) equal to 6.25x10^18 electrons
One electron has a charge of -1.60x 10^-19 coul (
I micro coulomb
(uc= 10^18) often used because coulomb is such a large change
Coulomb's Law of Electrostractic
The force between two point charges is directly proportional to these magnitudes and inversely proportional to square of the distance between.
Equation of Coulomb's Law
F= kQ,1Q,/ d^2
Q,1 Q,2
Charges in coulombs (keep signs)
Distance in meter
k= in a vacuum
8.987x10^9 nm^2/coul^2.
k= in air
8.93x10^9 nm^2/coul^2
Force is negative
For attraction
Force is positive
For repulsion
Electric field
Exists in the space around charged object exert a force on other proximate charged objects
Lines of force
Exist out of positive and into negative, are normal to surface tangent at a point would show the orientation of the field at the point
Force per unit charge of a point
Electric field intensity
Electric potential
Work done per unit charge on a charge moved between two points in an electric field
Potential gradient
Equals charge in potential per unit distance and is also called the
Static charge
Always lies on the surfaces of a conductor
Can have no potential difference between two on the surface of a blank. All points have equal potential
Equi potential
No work is done moving normal lines of force
Sharpest curve
Charges concentrate on the blank surfaces of nonspherical conductors
Conductive plates separated by an insulator, charge is stored on the plates
Ratio of charge on a capacitor plate to the potential difference between plates
Parallel capacitors
All caps have same potential difference since all opposite sides are connected
Series capacitor
All caps have same charge because opposite sides are connected within the circuit
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