Electric cables for your lamp have a plastic rubber coating around the wire. Explain why this material surrounds the metal cable.

theyre used to prevent accidental contact with other conductors of electricity, which might result in an unintentional electric current through those other conductors.

Explanation:

The coating acts as an insulator to cover the metal conducting part of the wire. Without this insulator, the wire could come in contact with other conductors and lead to an unintentional electric current through those other conductors.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete