A current I = 35.5 A flows through a strip of metal of width 3.5 cm (the figure

Question

A current I = 35.5 A flows through a strip of metal of width 3.5 cm (the figure below). An electromagnet is switched on so that there is a uniform magnetic field of magnitude 0.43 T directed into the page, and the Hall voltage is measured to be 6.7 µV. What is the drift velocity of the carriers in the strip?

__________ mm/s

Tried using this formula :

V_d=V_h/dB

V_d=4.45e-7 mm/s answer was wrong.

V_h=6.7e-6 V

d=35 mm

B=.43 T

A current I = 35. 5 A flows through a strip of metal of width 3. 5 cm (the figure below). An electromagnet is switched on so that there is a uniform magnetic field of magnitude 0. 43 T directed into the page, and the Hall voltage is measured to be 6. 7 µV. What is the drift velocity of the carriers in the strip? __________ mm/s

Explanation / Answer

V-d = V-h/(d*B)....

V-d = 6.7*10^-6/(0.035*0.43) =4.45*10^-8 V

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