Pictorial representation of a transformer; is important for generating the voltage required to produce X-rays.
The transformer pictured is a 'step-up' transformer, as the number of windings in the secondary coil outnumbers the primary coil windings.
Illustration created by Lachlan McKay.
Case Discussion
Briefly, a transformer works via electromagnetism. An electrical current is passed through the primary coil to induce a magnetic field in the iron core, which subsequently generates a current in the secondary coil.
The relationship between the number of windings of the coils and the voltages can be described by the first law of transformers;
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Vs/Vp = Ns/Np
where Vs = secondary voltage, Vp = primary voltage, Ns = secondary windings and Np = primary windings.