If it is something simple like a lamp, a kettle, or a heater, then, yes. They work by connecting a piece of (resistance) wire between the P&N. It gets hot by the current passing through it (you knew that, didn't you? Or are you the guy with a cannabis plantation in his loft?).
You will have someone along in a minute saying you should check the resistance in the ring, and betwen P&N, and to earth.
But if you are searching, e.g. for a cut or disconnected point in a ring, a continuity test is a start.