In this post, you will learn how to make simple and small van de Graaff generator with PVC pipe and 6-volt dc gear motor. Its very simple and the components are easily available in the hardware store. Van de Graaff generator is also known as a particle accelerator. It uses a moving belt to accumulate and transfer the charges on the hollow metal cylinder. It creates a high potential difference (volts) by static charges and hence ionizes the air around. It is used to study collision experiments in physics and fun science experiments in schools activity.