Calculating Hall Voltage with Given Values | Electromagnetism Problem"

[jaejoon89]

Homework Statement

What is the Hall voltage? B = 2.5 T, I = 15 A, q = 1.6*10^-19 C, n = 8.47*10^22 electrons/cm^3. B is going through a square slab 0.20 cm x 1.5 cm (B going through 0.20 cm thick part... not sure which one though counts as the width)

---

Homework Equations

V_H = v_d * B * w where w is width
v_d = I/(nqA)
Thus,
V = (IBd) / (nqA)

The Attempt at a Solution

V = (15 A * 2.5 T * 0.015 m) / ((8.47*10^22 electrons/cm^3)*(1*10^6 cm^3 / m^3)*(1.6*10^-19 C)*(0.015 m * 0.0020 m) = 1.3*10^-6V

It is multiple choice and the answers are 2.6 V, 1.9 mV, 3.6 micro V, 4.2 mV, or none of them. I am leaning towards none of the above but it usually is pretty rare for one of these questions so I suspect there's an error in my calculations...

 

[Redbelly98]

I get about same answer, 1.4 micro V