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Question
Q171) The position of both, an electron and a helium atom is known within 1.0 nm. Further the momentum of the electron is known within 5.0 × 10–26 kg ms–1. The minimum uncertainty in the measurement of the momentum of the helium atom is



SOLUTION

Δx × Δp = h/4π ( constant irrespective of any particle) Now it is given "position of both, an electron and a helium atom is known within 1.0 nm" or Δx is same for electron and a helium atom
∴ Δp must be same for electron and helium atom
Answer:(d)