Given : The mass of electron is $9.11 \times 10^{-31}\;kg$ . Planck constant is $6.626 \times 10^{-34}\;Js$ the uncertainty involved in the measurement of velocity within a distance of $0.1\;A$ is :

Question

$\begin{array}{1 1} (a)\;5.79 \times 10^{6}\;ms^{-1} \\(b)\; 5.79 \times 10^{7}\;ms^{-1} \\ (c)\;5.79 \times 10^{8}\;ms^{-1} \\ (d)\;5.79 \times 10^{5}\;ms^{-1} \end{array} $