513.001 Molecular and Solid State Physics

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Physical
Constants

Periodic System
of Elements

      

Hall effect

A current of 9 mA is passed through a bar of silicon while a magnetic field of 9905 Gauss is applied perpendicular to the current flow. The cross section of the bar is 0.003 cm². Two voltage probes are placed a distance 870 μm apart in a direction perpendicular to both the current flow and the magnetic field. The voltage that is measured is -4 mV.

What is the density of dopants?

dopant density = 1/cm³

1 Tesla = 1 Weber/m² = 10-4 Weber/cm² = 104 Gauss