Question

The dimensional formula of electron mobility in semiconductor is ______.

• A. $\left[M^{- 1} L^{1} T^{2} A^{1}\right]$
• B. $\left[M^{1} L^{0} T^{- 2} A^{- 1}\right]$
• C. $\left[M^{1} L^{- 1} T^{- 2} A^{- 1}\right]$
• D. $\left[M^{- 1} L^{0} T^{2} A^{1}\right]$

Answer 1

Answer: (D)

Mobility $=\frac{V_{d}}{E}=\frac{D r i f t \, v e l o c i t y}{E l e c t r i c \, f i e l d}$
$=\frac{\left[LT^{- 1}\right]}{\left[MLT^{- 3} A^{- 1}\right]}$
$=\left[M^{- 1} L^{0} T^{2} A^{1}\right]$