FIELD: physics.;SUBSTANCE: hall sensor is placed near a cryostat such that magnetic field lines coming out of the end of an inductance coil enter a plane in which current terminals TT and voltage terminals X-X of the Hall sensor are located. The current terminals T-T are connected through a first rheostat to terminals of a direct current source and voltage terminals X-X are connected to voltmeter leads. Timer leads are connected to terminals of the direct current source. The common contact of a three-way switch is connected through a second rheostat to the second lead of the inductance coil. The contact of the first position of the three-way switch is free, and contacts of the second and third positions are respectively connected to the negative and positive terminals of the direct current source.;EFFECT: broader functional capabilities and high measurement accuracy.;5 dwg
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