OpenStax University Physics/E&M/Capacitance
(Vol. 2): 5:Electric Charges and Fields 6:Gauss's Law 7:Electric Potential 8:Capacitance 9:Current and Resistance 10:Direct-Current Circuits 11:Magnetic Forces and Fields 12:Sources of Magnetic Fields 13:Electromagnetic Induction 14:Inductance 15:Alternating-Current Circuits 16:Electromagnetic Waves
Chapter 8
editCapacitance
edit defines capacitance. For a parallel plate capacitor, where A is area and d is gap length.
▭ and
for a spherical and cylindrical capacitor, respectively
▭ For capacitors in series (parallel)
▭
▭ Stored energy density
▭ A dielectric with will decrease the capacitor's electric field and stored energy , but increase the capacitance due to the induced electric field
For quiz at QB/d_cp2.8
editdefines capacitance.
where A is area and d<<A1/2 is gap length of parallel plate capacitor
= energy density