Electrometer

An electrometer is a special tool that helps us measure very small amounts of electricity. It's like a special kind of scale that can weigh tiny things that we can't see.

When there is electricity somewhere, it creates a special force called an electric field. The electrometer can detect this electric field and tell us how strong it is.

Just like how a thermometer measures how hot or cold something is, an electrometer measures how strong the electric field is. It can tell us if there is a little bit of electricity or a lot of electricity in a certain place.

Scientists use electrometers to study all kinds of things that use electricity, like the brain and the cells in our body. They are very useful for learning about how electricity works and how it can affect our bodies and the world around us.