| D1-1 | Electrostatic charge. |
| Purpose: | To demonstrate electrostatic charge. |
| Description: | Triboelectric effects are used to define the signs of charges. A glass rod rubbed with silk has a positive charge and an ebonite rod rubbed with cat's fur is negatively charged. The components should be kept in a disiccator to keep them dry. There are many materials from which one can obtain charges due to triboelectric effects. |
| References: | Ea-1 |
| Equipment: | Electroscope, glass rod, a piece of silk, ebonite rod and a piece of cat's fur |