- A small coil which is inserted into a magnetic field to measure its field strength, or any variations in it. Such a coil is connected to an indicating instrument, such as a ballistic galvanometer or a fluxmeter, and may or may not incorporate an amplifier. An exploring coil may also be utilized to examine the magnetic flux distribution of a magnetic field. Also called search coil, flip coil, magnetic test coil, magnetic probe, or pickup coil.
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