Atomic Structure Question 420

Question: The uncertainty in the position of an electron (mass=9.1×1028g) moving with a velocity of 3.0×104cms1 accurate up to 0.011 % will be

Options:

A) 1.92 cm

B) 7.68 cm

C) 0.175 cm

D) 3.84 cm

Show Answer

Answer:

Correct Answer: C

Solution:

  • Δx.Δp=h4π or Δx.mΔv=h4π;

Δv=0.011100×3×104=3.3cms1

Δx=6.6×10274×3.14×9.1×1028×3.3=0.175cm



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