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Four Probe Setup Resistivity Mapping Experiments for High School Science Kits Lab

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Four Probe Setup Resistivity Mapping Experiments for High School Science Kits Lab

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Four Probe Setup Resistivity Mapping Experiments for Physics Lab for High School Science Kits Lab

Four Probe Setup Resistivity Mapping Experiments for High School Science Kits Lab — specification

Made in our own plant in Ambala Cantt, the Four Probe Setup Resistivity Mapping Experiments for High School Science Kits Lab is supplied to colleges, technical institutes and industry for laboratory work, in single units or bulk. Part of our High School Science Kits range.

Four Probe Setup Resistivity Mapping Experiments for Physics Lab - Four probe set-up for mapping the resistivity of large samples The Four Probe Method is one of the standard and most widely used method for the measurement of resistivity. In its useful form, the four probes are collinear. The error due to contact resistance, which is significant in the electrical measurement on semiconductors, is avoided by the use of two extra contacts (probes) between the current contacts. In this arrangement the contact resistance may all be high compare to the sample resistance, but as long as the resistance of the sample and contact resistance's are small compared with the effective resistance of the voltage measuring device (potentiometer, electrometer or electronic voltmeter), the measured value will remain unaffected. Because of pressure contacts, and 2 way motion, the arrangement is specially useful for quick measurement on large samples at room temperature.

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