Week 4 Conductors, Capacitance and Dipoles Flashcards
1
Q
what are 5 properties of a perfect electrical conductor
A
1 E = 0 no current flow
2 charge density inside = 0
3 All excess charges reside at the surface
4 All points on and in a conductor are at the same potential
5 E-field inside an empty cavity in a conductor is 0
2
Q
define a capacitor
A
electrical components that store charge but can also be considered to be storing energy
3
Q
what is the capacitance equation
A
C = Q/φ = εA/d
4
Q
what are the units of Capacitance
A
farads
5
Q
what is the torque on a dipole equation
A
τ = p x E
6
Q
what is the Potential energy dipole equation
A
U = -p*E
7
Q
what is the dipole moment equation
A
p = qd
