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Old Mar 15th 2009, 12:32 PM   #1
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Join Date: Mar 2009
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solid state

A thin straight copper wire of length 2 m is cooled to 100 K. At this temperature the electrical conductivity is 2.87 x 10^8 ohm^-1 m^-1, and the hall coefficient is -5.5 x 10^-11 m^3 C^-1. A voltage difference of 30 mV is applied between the ends of the wire, and a magnetic field of 0.2 T is applied perpendicular to the wire. assuming the drude model,calculate
the number density of charge carriers (use the Hall coefficient)
the mean time between electron-ion collisions
the carrier drift velocity
the Hall field

can anyone help me with these questions please
thanks
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