4-A 12-mA electron beam is accelerated through a potential difference of 2 x 105 V in an X-ray tube with a tungsten target. X rays are generated as bremsstrahlung from the electrons stopping in the target. Neglect absorption in the tube. (a) Estimate the fraction of the beam power that is emitted as radiation. (b) How much power is radiated as bremsstrahlung?

4-A 12-mA electron beam is accelerated through a potential difference of 2 x 105 V in an X-ray tube with a tungsten target. X rays are generated as bremsstrahlung from the electrons stopping in the target. Neglect absorption in the tube. (a) Estimate the fraction of the beam power that is emitted as radiation. (b) How much power is radiated as bremsstrahlung?