When Robert J. Van De Graff invented his generator in 1929, he probably didn’t expect it would become one of the most widely-used tools to teach people about electrostatics! Originally developed as a particle accelerator to be used in physics research, Van De Graff Generators produce high-voltage, direct current (DC) electricity. This high voltage can damage small, sensitive components in pacemakers and other electronic devices, which is why John double-checks with Annie before they shock each other!

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