electric fields Flashcards
What is coulombs law
F1 = F2 = Q1Q2 / 4pipermiativityr^2
what force would a charged body experience due to the presence of Q
(Q/4pipermiativityr^2)*deirection vector
where can you measure Eq
the space around a point charge
if we put a second charge q in the vicinity of Q the force is
F =q.Eq
what is the relationship between the field and the charge
the field is proportional to the charge
what is the charge of a patch on an infinite strip at position x
dE
what is dE
(rowedxdy)/4pipermiativity*(r^2+x^2)
what is the effect o a partner patch on the electric field parallel to the strip
it cancels
what is the component normal to the strip
dE* r/(r^2 + x^2)^1/2
what is the total field from the strip
(rowedy)/2pipermitivity*r
what are the units for an electric field
Newtons/Coulomb
