Electrostatics Flashcards
how do you describe the electric field inside a charged parallel plate capacitor ?
Electric field is constant and perpendicular to the plates.
Describe the electric potential in a parallel plate capacitor ?
Electric potential increases linearly from the negative to the positive plate.
how do electric field lines point towards charges ?
Electric field lines point AWAY from positive charges, Toward negative charges.
what does voltage also signify ?
V= Potential Difference
What happens to charge and capacitance with a dielectric between isolated conductors ?
The presence of a dielectric between two isolated conductors carrying equal but opposite charges cannot change the magnitude of the separated charge, but it does INCREASES the capacitance.
What is the formula for change in Electric PE ?
change PE ^E = q x change in electric potential = qV
What is work done by electric field?
W by E = - change in Electric potential energy
What is the elementary charge (smallest possible unit) ?
e = 1.6 x 10^-19 C
What is electrostatic Force equation ?
FE = K |Q||q|/ r^2
what is value of k (dielectric constant) in electrostatics ?
k = 9 X 10^9 N x m ^2/ C^2
What is formula of electric field ?
E= Electric force/ charge (q)
E= FE/q
What is electric field from point charge ?
E = k |Q|/r^2
What is unit for electric potential ?
J/C or (Volt)
What is formula for electric potential form point charge ?
electric potential = k Q/r
What is the unit for electric charge?
Coulombs