X-ray Questions
12. a) State the energy changes that take place in an X – ray tube
b) Electrons in an X-ray tube are accelerated by a potential difference of 40 kV. If 20 % of the
electrons are converted into X- rays, determine the maximum wavelength of the emitted
electrons.
c) i) Draw a simple circuit consisting of a photocell to show the direction of flow of current
ii) The diagram below shows a wave form displayed on a CR0 screen.
If the Y — gain reads 0.5V cm-1 while the time base is set at 0.1 ms cm-1, determine the amplitude
and frequency of the wave.
Radioactivity Questions
1. A radioactive substance X decays by emission of two alpha particles and one beta particle.
Write a balanced equation of this emission.
