X RaysLO:

•Describe how electron beams produce X Rays•Calculate the current in terms of rate of flow of

electrons

(Rotated by motor)

Current I (A) = N x e t

I = currentN = number of electrons flowing in timee = charge on one electron (1.6 x 10-19C) THIS IS CONSTANTt = time

QuestionShow that in a current of 1A there are 6 x 1018 electrons flowing every second.

Effects of Altering Current and Voltage

• Greater current: 1. More X–rays produced each second2. More intense X-ray beam

• Increase the accelerating voltage which is supplied to the anode:1. Electrons have more kinetic energy2. This produces more energetic X-rays that have a shorter wavelength3. These are more penetrating