The measurement of the electron position is associated with an uncertainty in momentum, which is equal to `1 xx 10^-18 g cm s^-1`. The uncertainty in electron velocity is (mass of an electron is `9 xx 10^-28 g`)

Options

A. `1xx10^(5)"cm s"^(-1)`
B. `1xx10^(11)"cm s"^(-1)`
C. `1xx10^(9)"cm s"^(-1)`
D. `1xx10^(6)"cm s"^(-1)`

Answer

C

Explanation

Uncertainty in momentum
`(mDelta upsilon)=1xx10^(18)"g cm s"^(-1)`
Uncertainty in velocity
`(Delta upsilon)=(1xx10^(-18))/(9xx10^(-28))=1.1xx10^(9)"cm s"^(-1)`