Question

Uncertainty in position of minute of mass ` 25 g` in space is ` 10^(-5) m`. The uncertaint in its veloty (in `ms^(-1)` is :
A. ` 2. 1 xx 10^(-34)`
B. `0. 5xx 10^(-34)`
C. `2. 1 xx 0^(-28)`
D. `0.5 xx 10^(-23)`

Answer 1

Correct Answer - C
` Delta u h/( 4 pi m . Delta x)`
` = (6.626 xx 10^(-34))/( 4 xx 3. 14 xx 15 xx 10^(-3) xx 10^(-5))`
` = 2. 1 xx 10^(-28) m sec ^(-1)`.