Question: In a Hall experiment, a semiconductor carrying current in the positive x-direction is exposed to a magnetic field in the positive y-direction. (Assume a right-handed

In a Hall experiment, a semiconductor carrying current in the positive x-direction is exposed to a magnetic field in the positive y-direction. (Assume a right-handed coordinate system.) If the charge carriers are positively charged "holes," in which direction is ...
a) The drift velocity,
b) The cross product of velocity and magnetic field,
c) The Lorentz magnetic force, and
d) The Hall electric field?
e) Which of these vectors would change direction if the charge carriers were not "holes" but electrons?
f) If the longitudinal electric field and the magnetic field are held constant, and the charge carrier concentration of the material were doubled with no change in mobility, by how much would the Hall voltage change?

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