could I use something like a magic amulet while it’s not on my neck? [duplicate]

What is defined as ‘worn’? Does an amulet or ring have to be on my neck or finger specifically or do I just have to be carrying it somewhere on my body or even in my backpack? For instance, if I had a Clockwork Amulet on my belt, does that constitute as me ‘wearing’ it so I could use it?