$\Delta x\,\, = \,\,\frac{h}{{4\pi m\Delta v}}\,\, = \,\,\frac{{6.6\,kt\,{{10}^{ - 34}}}}{{4\, \times \,3.14\, \times \,9.1\, \times \,{{10}^{ - 31}}\, \times \,0.03}}\,\, = \,\,1.92\, \times \,{10^{ - 3}}$
[આપેલ : ઇલેકટ્રોનનું દળ = $9.1 \times 10^{-31} \mathrm{~kg}$, પ્લાન્ક અચળાંક $(h)=6.626 \times 10^{-34} \mathrm{Js}$ ] (Value of $\pi=3.14$ )