An X-ray tube is opearted at 18 kV. The maximum velocity of electron striking the target is

Options

A. `8xx10^7 m//s`
B. `6xx10^7 m//s`
C. `5xx10^7 m//s`
D. None of these

Answer

A

Explanation

`K_(max) = 18xx10^3 eV = (1)/(2) mv_(max)^2`
`:. V_(max) = sqrt(2xx18xx10^3xx1.6xx10(-19))/(9.1xx10^(-31)`
`=8xx10^7 m//s.`