NTA Abhyas JEE Main2020ChemistryStructure of AtomPractice
For an electron whose positional uncertainty is 1.0 × 1 0 - 10 m , the uncertainty in the component of the velocity in m s - 1 will be
Options
- A5.8 × 10 5
- B1 0 9
- C1 0 2
- D1 0 15
Correct answer
A. 5.8 × 10 5
Step-by-step solution
According to uncertainty principle ⇒ δx × δp = h 4π ⇒ δp = h 4π × δx ⇒ mδv = h 4πδx δ v = h 4 π m δ x = 6.625 × 10 − 34 9.1 × 10 − 31 × 10 − 10 × 4 × 3.14 = 5.8 × 10 5