An X-ray operates at 30000V and the current through it is 2mA. Given that the charge of an electron is 1.6 x 10^{-19}C, h = 6.63 x 10^{-34}JS, speed of light, C = 3.0 x 10^{8}m/s, calculate:-

- the maximum kinetic energy of the electrons when hitting the target.
- the number of electrons hitting the target per second.
- the minimum wavelength of the X-rays emitted.