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

question 31

Multiple Choice

The Hall affect is used to measure the carrier density of a thin sheet of electrons.When a current of 8.0 $\mu$ 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 of 0.53 mV across the width of the sheet.What is the carrier density in the electron sheet?

• A)4.81 * 10¹⁸ m^-3
• B)5.90 * 10¹⁹ m^-3
• C)2.62 * 10²⁰ m^-3
• D)5.90 * 10²⁴ m^-3
• E)6.74 * 10²⁵ m^-3

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Definitions:

Explicit Bias

Refers to the attitudes and beliefs we have about a person or group on a conscious level.

Ingroup Bias

The tendency to favor and extend loyalty to members of one's own group over those of other groups.

Ingroup Bias

The tendency for people to give preferential treatment to others they perceive to be members of their own groups.

Just-world Phenomenon

The cognitive bias to believe that the world is inherently fair and that all individuals get what they deserve, leading to rationalizations of injustice.