1. X Rays LO: Describe how electron beams produce X Rays Calculate the current in terms of rate of flow of electrons

2. (Rotated by motor)

3. Current I (A) = N x e t I = current N = number of electrons flowing in time e = charge on one electron (1.6 x 10 -19 C) THIS IS CONSTANT t = time Question Show that in a current of 1A there are 6 x 10 18 electrons flowing every second.

4. Effects of Altering Current and Voltage Greater current: 1. More X–rays produced each second 2. More intense X-ray beam Increase the accelerating voltage which is supplied to the anode: 1. Electrons have more kinetic energy 2. This produces more energetic X-rays that have a shorter wavelength 3. These are more penetrating