electrical
The word 'elektrisch' is the German equivalent of the English word 'electrical'. It is used to describe anything related to or powered by electricity. For example, you could say 'ein elektrisches Gerät' to refer to an electrical device.
The electric car is very quiet.
This sentence describes an electric car (Das elektrische Auto) as very quiet (ist sehr leise). Electric cars, unlike those with combustion engines, do not make much noise while running, which is alluded to in this sentence.
Electric devices consume a lot of energy.
None
He plays electric guitar in a band.
This sentence talks about a person (Er, translated as 'he') who plays the electric guitar (elektrische Gitarre) in a band (in einer Band). The phrase 'elektrische Gitarre' highlights that the guitar being referred to is not an acoustic one, but an electric version.