Question

5. Look at Figure 7.8 which shows Rigan touching the negatively charged dome of an instrument called the Van de Graaff generator. a) Why did Rigan have to stand on a plastic chair?​

Answer 1

Rigan stood on a plastic chair to provide insulation between Rigan and the environment.

If Rigan was connected electrically to the environment, then no net charge would be accumulated by Rigan and no effect would be noted.