Engineering, 21.02.2020 18:02 shatj960
A cuboid of Ge has contacts over all of its 2mm × 1 mm ends and point contacts approximately half way along its 5 mm length, at the centre of the 5 mm × 1 mm faces. A magnetic field can be applied parallel to this face. A current of 5 mA is passed between the end contacts when a voltage of 310 mV is applied. This generates a voltage across the point contacts of 3.2 mV with no magnetic field and 8.0 mV when a field of 0.16 T is applied.
ii. Using the corrected Hall voltage find the carrier density in the Ge sample.
iii. Estimate the conductivity of the Ge.
iv. What is the mobility of the carriers?
ANSWERS:
ii) 1.04e21 m^-3
iii) 40.3 s/m
iv) 0.24 m^2/V*s
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A cuboid of Ge has contacts over all of its 2mm × 1 mm ends and point contacts approximately half wa...
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