1.

• A. $\frac{{\mathrm{n}}^2{\mathrm{h}}^2{\mathrm{ϵ}}_0}{\mathrm{\pi }{\mathrm{me}}^2}$
• B. $\frac{{\mathrm{n}}^2{\mathrm{h}}^2{\mathrm{ϵ}}_0}{\mathrm{\pi }{\mathrm{me}}^2}$
• C. $\frac{{\mathrm{n}}^2{\mathrm{h}}^2{\mathrm{ϵ}}_0}{\mathrm{\pi }{\mathrm{me}}^2}$
• D. $\frac{{\mathrm{n}}^2{\mathrm{h}}^2{\mathrm{ϵ}}_0}{\mathrm{\pi }{\mathrm{me}}^2}$

Post your comments here: