The amp-clamp's probe senses the strength of the magnetic field set up by current in the wire and the meter deflection is proportional to the amount of current.

Question

Quizplus · Accepted Answer

An amp-clamp (clamp meter) measures current by detecting the magnetic field around a conductor, with the meter's deflection or digital reading being proportional to the current's magnitude.

The Amp-Clamp's Probe Senses the Strength of the Magnetic Field