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Structure of Atom question

2008 · Q107
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Structure of Atom question

2008 · Q107

NEETChemistryStructure of AtomMCQ+4 / −1
The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 ×\times× 10−-−18 g cm s−-−1. The uncertainty in electron velocity is (mass of an electron is 9 ×\times× 10−-−28 g)
  1. A
    1 ×\times× 105 cm s−-−1
  2. B
    1 ×\times× 1011 cm s−-−1
  3. C
    1 ×\times× 109 cm s−-−1
  4. D
    1 ×\times× 106 cm s−-−1
View written solutionFree

Correct answer: C

Δv\Delta vΔv = 1×10−189×10−28=1.1×109cm s−1{{1 \times {{10}^{ - 18}}} \over {9 \times {{10}^{ - 28}}}} = 1.1 \times {10^9}cm\,{s^{ - 1}}9×10−281×10−18​=1.1×109cms−1

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