# Shared Flashcard Set

## Details

Tipler Physics Ch 24
Capacitance
9
Physics
05/26/2008

Term
 What is the equation for voltage in a spherical conductor if V=0 is chosen at infinity?
Definition
 V = kQ/R
Term
 What is self-capacitance?
Definition
 The amount of charge a conductor can hold at a given voltage difference C = Q/V
Term
 What does capacitance depend on?
Definition
 The size, shape, and relative positions of the conductors C = Q/V = Q/(kQ/R) = R/K
Term
 What is capacitance measured in?
Definition
Term
 What is the capacitance of a parallel-plate capacitor?
Definition
 C = εoA/dA = Area of one of the platesd = distance between capacitorsεo =  8.85 x 10-12 F/m
Term
 What is the capacitance of a cylindrical capacitor?
Definition
 C = 2 pi εoLln(R2/R1) R1= Inner radiusR2 = Outer radiusL = length of capacitor
Term
 What are the equations for the energy stored in a capacitor?
Definition
 U = 1/2 Q2/C = 1/2 QV = 1/2 CV2
Term
 What is the energy density of an electrostatic field?
Definition
 1/2 εoE2
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