An X-ray tube operated at a DC potential difference of 40 kV, produces heat at a rate of 3136 W. Assume that 2% of energy of the electron is converted into X-rays. The number of electrons per second striking the target is `nxx10^(17)` fill n in your OMR sheet.

Answer

`5`

Explanation

`P=(dQ)/(dt)=(eVeta)(dN)/(dt)`
`=3136/((1.6xx10^(-19))(40xx10^(3))(0.98))`
`=5xx10^(17)`