If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is
1
\(\frac{1}{2 \mathrm{~m}} \sqrt{\frac{\mathrm{~h}}{\pi}}\)
2
\( \frac{1}{\mathrm{~m}} \sqrt{\frac{\mathrm{~h}}{\pi}}\)
3
\(\sqrt{\frac{\mathrm{h}}{\pi}}\)
4
\(m \sqrt{\frac{\mathrm{~h}}{\pi}}\)