How do you safeguard for electricity?

From the wall socket.

It comes from the Greek word "electron." However, to the Greeks that word didn't mean what it does to us; it meant the material we call amber. It's called that because one of the first noticed...

flow of electricity is measured by an instrument galvanometer

It comes from the Greek word "elektron", which means "amber." They named it "electricity" because if you rub animal fur with amber, the dried sap from trees, you get static electricity.

Yes it is.