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,0.27-mm wide and 12-nm thick,a magnetic field of 0.75 T perpendicular to the sheet produces a potential difference across the width of the sheet.If the carrier density in the electron sheet is 6.74 * 10²⁵ m^-3,what potential difference is produced across the width of the sheet?

A) 0.32 mV
B) 0.46 mV
C) 0.72 mV
D) 0.53 mV
E) 0.67 mV