Ask your students the following brainteaser question: If you charge the capacitor by cranking the generator, what will happen when you stop cranking and release the handle of the generator? (a) It will continue to rotate in the same direction, (b) It will rotate in the opposite direction, (c) It will remain at rest.
For discussion: Have students decide for themselves what form of energy is being stored here. Rotational energy? Electrical? Magnetic?