An entire book on electrolytic capacitors. Originally published 1938 and website version is an in-progress update. Part 1 is sufficiently general and current to give one a background in capacitors and electrolytic capacitors.

Learners investigate circuits. Some topics examined are a photo resistor, capacitor, and diode. The resource includes a circuit applet.

AC circuits with capacitors and inductors respond to the frequency, as well as the voltage. Find the frequency value that reduces the circuit power to half the maximum.

This article from Khan Academy provides information about dielectrics. This information is intended for the Class 12 Physics Course (India).