The position of both an electron and a helium atom is known within `1.0 nm` and the momentum of the electron is known within `50 xx 10^-26 kg ms^-1`. The minimum uncertainty in the measurement of the momentum of the helium atom is.

Options

A. `50kgms^(-1)`
B. `60kgms^(-1)`
C. `80xx10^(-26)kgms^(-1)`
D. `50xx10^(-26)kgms^(-1)`

Answer

D

Explanation

The product of uncertainties in the position and the momentum of a sub atomic particle = `h//4pi`. Since `Deltax` is same for electron and helium so `Deltap` must be same for both the particle i.e. `50xx10^(-26)kgms^(-1)` (given).