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 answer
    C
    $2.1 \times 10^{-28}$
  • 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'.

Relevant Questions