Free Essay

In: Science

Submitted By shaken

Words 358

Pages 2

Words 358

Pages 2

(1)

V_H=(B*i)/(n*e*t)

This equation can be used to calculate the hall voltage (VH). The density of the charge carriers is n which is measured in meters cubed. The magnitude of the charge of the electron is e. The magnetic field perpendicular to the sample is B. Current in the sample is i and the thickness of the sample which is directed by the magnetic field is t. Mobility differs in unique materials because the charge carriers are more mobile thus creating a greater or lesser flow in the current.

(2)

μ=i_x/V_x *L/(n*e*w*t)

This equation calculates the mobility of the charge carriers (μ)which is the ratio of drift velocity to the electric field which is described as parallel to the drift velocity. The length of the sample in the direction of the current flow is noted by L. The width of the sample in the direction of the hall voltage is shown as w, and the Vx is the voltage drop along the sample in the direction of L when carrying a certain current of ix. When the hall voltage and mobility are calculated they can be compared to the theoretical values to determine the percentage errors.