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Easyphysics: Chapter 15 the Circuit
Learners investigate circuits. Some topics examined are a photo resistor, capacitor, and diode. The resource includes a circuit applet.
Concord Consortium
Concord Consortium: Sparks Tutorial: Finding the Cutoff Frequency
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.
Khan Academy
Khan Academy: Dielectrics Article
This article from Khan Academy provides information about dielectrics. This information is intended for the Class 12 Physics Course (India).