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