The Hall Affect Is Used to Measure the Carrier Density $\mu$

The Hall affect is used to measure the carrier density of a thin sheet of electrons.When a current of 80.0 $\mu$ A flows through the length of the electron sheet,which is 1.2-mm long and 0.27-mm wide,a magnetic field of 0.75 T perpendicular to the sheet produces a potential difference of 0.53 mV across the width of the sheet.If the carrier density in the electron sheet is 6.74 * 10²⁵ m^-3,what is the thickness of the sheet?

A) 10 nm
B) 14 nm
C) 9.0 nm
D) 8.0 nm
E) 12 nm

Correct Answer:

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