Electrostatics Handout

D.) Conservation of Charge – net __________ of closed system ____________

ex. If 2 charges are brought together their combined charge is ___________

Before contact-

After contact -

*** Total ___________ = total ____________ after

E.) Elementary Charge - ____________________________________________

Charges come in ____________ of ___________________ Coulombs

Proton +1.6 X 10 ^-19 C : Ref. Electron - _____________ C : Ref.

How many _________________________ are there in an object with a charge of - 9.6 X 10 ^–19 C ?

Answer _____________________

Coulombs Law – Calculating the forces between two fixed point charges

F - __________ force of attraction or repulsion

(Newtons) F = _______________

q - ______________of each object

r - __________________ between objects

(On ______________________) k- electrostatic constant = _______________

Ex) What is the electrical force between 2 very small objects located .5m apart when the charge on one object is 4X10 ^{– 8} C and the charge on the second object is 6X10 ^-5 C ?

Relationships- F/r ________________ F/q __________________

Two charges attract each other with a force of F. If one charged was doubled and the other charged was tripled, how would that change the attractive force between these charges?

______________________

G.) Electric Field - region in space where electric forces act on charges

1.) vector quantity - _______________________________

2.) E = ______

E = __________________________________(N/C)

q = amount of ____________________used to test field (C)

F = ________________on charge in that field (N)

3) Direction of an electric field is drawn to show how the field acts on

___________________________(Decided by convention)

Electric Field Patterns

a) _______________ charge b) ______________charge

____________ Fields

*** Field within charge = _______________

b) 2 opposite charges d) 2 like charges

c) Between positive and neutral charge