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 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 magnitude of the magnetic field?

A) 1.0 T
B) 0.86 T
C) 0.75 T
D) 1.1 T
E) 0.67 T

Correct Answer:

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