The electron mobility in N-type germanium is 3900 cm / v - s and its conductivity is 6.24 mho / cm, then impurity concentration will

Q: The electron mobility in $N$-type germanium is $3900 cm / v - s$ and its conductivity is $6.24 mho / cm$, then impurity concentration will be if the effect of cotters is negligible

(d)$\begin{aligned}& \sigma=e n_e \mu_e \\& \Rightarrow n_e=\frac{\sigma}{e \mu_e}=\frac{6.24}{1.6 \times 10^{-19 \times 3900}}=10^{16} / \mathrm{cm}^3\end{aligned}$

MCQ

CBSE - English Medium

The electron mobility in $N$-type germanium is $3900 cm / v - s$ and its conductivity is $6.24 mho / cm$, then impurity concentration will be if the effect of cotters is negligible

A(a) $10 cm$
B(b) $10 / cm$
C(c) $10 / cm$
D(d) $10^* / cm$

STD 12 Science
JEE physics
Electronics
NCERT

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