Fig. 1 25. A strip-like conductor with dimensions a b c = 6.0.5.6 mm³ is serving as a Hall-probe. A current of 40 mA is flowing, and the sample is placed in a magnetic field B = 0.8 T, as a result a Hall-Votlage of UH = 20 mV is measured. a) What is the charge carrier concentration in the sample? b) What side of the strip-like probe accumulates negative charge if the charge transport is done via electrons? c) What Hall-voltage arises from bipolar conduction, hence when the same amount of electrons and holes contribute to the conduction? Electrons and hole can be assumed to have equal mobility. Fig. 2

Fig. 1 25. A strip-like conductor with dimensions a b c = 6.0.5.6 mm³ is serving as a Hall-probe. A current of 40 mA is flowing, and the sample is placed in a magnetic field B = 0.8 T, as a result a Hall-Votlage of UH = 20 mV is measured. a) What is the charge carrier concentration in the sample? b) What side of the strip-like probe accumulates negative charge if the charge transport is done via electrons? c) What Hall-voltage arises from bipolar conduction, hence when the same amount of electrons and holes contribute to the conduction? Electrons and hole can be assumed to have equal mobility. Fig. 2