Term
electrostatic force is a nonconsevative or a conservative force? 

Definition


Term
as particle accelerates from point a to point b is the potential energy decreasing or increasing?
what about KE? 

Definition
potential energy is decreasing
KE is increasing by an equal amount 


Term
given a positive & negative plate
+ 
+ 
+ 
+ 
+ 
1.where will the postive charge,q, have :
the highest potential energy
2.where will the negative charge,q, have :
the highest potential energy?


Definition
1.at the positive plate
2. at the negative plate 


Term
what is Electric potential ? 

Definition
potential energy per unit charge 


Term
what are Equipotential Lines 

Definition
equipotential is a line or surface over which the potential is constant. 


Term
Electric field lines are _____ (direction) to equipotentials. 

Definition


Term
The surface of a conductor is an usually made up of 

Definition


Term
what is an electron volt (eV) ? 

Definition
the energy gained by an electron moving through a potential difference of 1 volt. 


Term
potential vs electric field which is a scalar quantity, which is a vector? 

Definition
potential: scalar
electrical field: vector 


Term
The potential due to an electric dipole is equal to 

Definition
the sum of the potentials due to each charge,
and can be calculated exactly 


Term

Definition
two equal point charges (Q )of opposite signs that are seperated by a distance l. 


Term

Definition
p = Ql
Q=sum of point charges
l= distance btwn them 


Term

Definition
consists of two conductors that are close but not touching
fcn:the ability to store electric charge. 


Term
When a capacitor is connected to a battery, the charge on its plates is 

Definition
proportional to the voltage
on the battery.
(aka the emf of battery) 


Term
capacitancedoes not depend on


Definition


Term
capacitance (the ability to store electrical charge) is a fcn of 

Definition
the geometry and materials of the capacitor. 


Term

Definition
is an insulating sheet of material placed bwtn the plates of a capacitor. 


Term
T or F: dielectrics do not breakdown, allwing electric flow as readily as air. 

Definition
True, high voltages can be applied without charge passing across the gap. 


Term
T or F: dielectrics allows the plates to placed farther apart, thus decreasing the captiance. 

Definition
False, dielectrics allow the plates to be placed together without touching, thus increasing the capactiance. 


Term
t or f: if a dielectric is used as an insulator then it can increase the capactiance by a factor K 

Definition
true, K is also known as dielectric constant 


Term
Concept question: An airfilled capacitor consisting of 2 parallel plates seperated by a distance,d, is connected to a battery of voltage V and acquires a charge, Q.
Question: While is still connected to the battery, a slab of dielectric material with K=3 is inserted btwn the capacitor plates. Will the charge (Q) increase , decrease, or remain the same? 

Definition
Increase
recall the capacitor is still connected to the capacitor, so the voltage (V) will continue to be equal to the charge of the battery.
Recall Q= CV
where C is the capactiance , which increase by the use of a dielectric.
Therefore MORE CHARGE (Q) will be pulled from the battery to the plates of the capacitor 


Term
Suppose the same airfilled capacitor mentioned in the other example, is charged (to Q )and then disconnected from the battery.
Next a dielectric is inserted btwn the plates,
Will Q,C,or V change? 

Definition
Q (charge): remains the same
the capacitor is isolated (disconnected) so there is nowhere for the charge to go.
C(capacitance): increases
because dielectric is inserted
V(voltage): decreases
Q= CV
V= Q/C
if the denominator increases while numerator remains the same (aka being divided by even MORE PEOPLE ) the volatge will decrease. 


Term

Definition
is the maximum field a dielectric can experience without breaking down. 


Term
How do molecules in an dielectric arrange themselves? 

Definition
The molecules in a dielectric tend to become oriented in a way that reduces the external field.(this is referring to the plates)
aka reduces charge repulsions 


Term
why is it important that the molecules in the dielectric materaial reduce repulsions with the respect to the plates? 

Definition
electric field within the dielectric is less than it would be in air,
allowing more charge to be stored for the same potential. 


Term

Definition
as the energy per unit volume & is the same no matter the origin of the electric field 


Term
an example of Storage of Electric Energy 

Definition
Heart defibrillators use electric discharge to “jumpstart” the heart, and can save lives 


Term
For capacitors in SERIES
, all capacitors are equal in? 

Definition
charge
(each capacitor has to store the same amout of charge). 


Term
For capacitors in PARALLEL
, all capacitors are equal in? 

Definition

