Question

A doped silicon wafer has a thickness of 0.5 mm and a Hall-coefficient of $2\times {10}^{-2}{m}^3/C$. If the current through the wafer is 15 mA, then the magnitude of hall voltage for a magnetic flux density of $\text{0.2 T}$ is_______mV.

• A. 120

Answer 1

The correct option is A 120
The Hall voltage is given by

$V=R_{H}IB/t$

Where, $R_H$ = Hall coefficient

t = Wafer thickness (m)

I = Current through water (A)

B = Magnetic flux density (T)

$V=\frac{2\times {10}^{-2}}{0.5\times {10}^{-3}}\times 15\times {10}^{-3}\times 0.2$

$=0.12V=120mV$