SATHEE: Structure of Atom - Result Question 25

Structure of Atom - Result Question 25

####27. The measurement of the electron position if associated with an uncertainty in momentum, which is equal to $1 \times 10^{- 18} g c m s^{- 1}$ . The uncertainty in electron velocity is,

[2008] (mass of an electron is $9 \times 10^{- 28} g$ )

(a) $1 \times 10^{9} c m s^{- 1}$

(b) $1 \times 10^{6} c m s^{- 1}$

(d) $1 \times 10^{11} c m s^{- 1}$

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Solution:

(a) $Δ p = m Δ v$

Substituting the given values of $Δ x$ and $m$ , we get $1 \times 10^{- 18} g c m s^{- 1} = 9 \times 10^{- 28} g \times Δ v$

or $Δ v = \frac{1 \times 10^{- 18}}{9 \times 10^{- 28}}$

$= 1.1 \times 10^{9} c m s^{- 1} ≃ 1 \times 10^{9} c m s^{- 1}$

Structure of Atom - Result Question 25

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Structure of Atom - Result Question 25

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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