Q41 / 225 · JEE Main 2002 · Chemistry
Uncertainity in position of a minute particle of mass $25 \mathrm{~g}$ in space is $10^{-5} \mathrm{~m}$. What is the uncertainity in its velocity (in $\left.\mathrm{ms}^{-1}\right) ?\left(\mathrm{~h}=6.6 \times 10^{-34} \mathrm{Js}\right)$
- A$2.1 \times 10^{-34}$
- B$0.5 \times 10^{-34}$
- Correct answerC$2.1 \times 10^{-28}$
- D$0.5 \times 10^{-23}$
Solution
$\Delta \mathrm{x} \cdot \Delta \mathrm{v}=\frac{\mathrm{h}}{2 \pi \mathrm{m}}$
Hence, the correct answer is option: 'C'.