Uncertainty in position of a `0.25 g` particle is `10^-5`. Uncertainty of velocity is `(h = 6.6 xx 10^-34 J s)`.

Options

A. `1.2 xx 10^34`
B. `2.1 xx 10^-26`
C. `1.6 xx 10^-20`
D. `1.7 xx 10^-9`

Answer

B

Explanation

(b) According to `Delta x xx m xx Delta v = (h)/(4 pi)` ,
`Delta v = (h)/(Delta x xx m xx 4 pi)`
=`(6.6 xx 10^-34)/(10^-5 xx 0.25 xx 10^-3 xx 3.14 xx 4)`
=`2.1 xx 10^-26 m//s`.