A) \[50kgm{{s}^{-1}}\]
B) \[80kgm{{s}^{-1}}\]
C) \[8.0\times {{10}^{-26}}kg\text{ }m{{s}^{-1}}\]
D) \[5.0\times {{10}^{-26}}kg\text{ }m{{s}^{-1}}\]
Correct Answer: D
Solution :
[d] According to Heisenberg uncertainty principle, \[\Delta x\times \Delta p=\frac{h}{4\pi }\] (which is constant). As \[\Delta x\]for electron and helium atom is same, thus momentum of electron and helium will also be same, therefore the momentum of helium atom is equal to \[5\times {{10}^{-26}}kgm{{s}^{-~1}}.\]
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