V s N s V p N p = 1. What is mutual induction, how does it work? 2. What is self induction, how does it work? 3. What is the significance of the turns ratio? 4. How does the turns ratio effect voltage and amperage? 5. What is the difference in the above formulas? 6. What kind of transformers are found in the x-ray circuit, 7. What materials are transformers made of, what design characteristic makes them work more effeciently? 8. What are the names of the energy losses in a transformer? I s N p I p N s =

1. At what degree are each of the red dots at? 2. Where do these degrees come from, e.g., what created them? 3. How many sine waves are produced in one second? 4. How many pulses are created by each sign wave? 5. How many pulses are there per second?

A. B. 1. If B were repeated over an interval of time what would that interval be called? 2. What components of a sine wave has not been represented on the labeling of this diagram? What are those components a function of? 3. Which of these 4 components of the sine wave represents the energy of photons? Which represents the kV? 1. What is represented by A? 2. What is represented by B?

Answers Slide 1 1. Current flowing in a helix by virtue of a moving electromagnetic field cutting across the coils of a conductor, with no physical contact. 2. Current produced in a single helix, by the effect of a moving electromagnetic field from one coil, cutting across adjacent coils. 3. The ratio of turns in the primary and secondary coil of a transformer is the ratio of the voltage and amperage produced in the secondary coil by mutual induction. 4. With more turns in the primary than the secondary, the V goes up and Amps go down, and vice versa. 5. V calculates voltage, and I calculates amperage. 6. Step up (high voltage circuit) and step down (filament circuit) 7. Copper wire, iron (ferrous) core. The iron core enhances the magnetic field strength 8. I 2 R, Hysteresis, and Eddy current losses. Slide , 90, 180, 270, The angle of the armature of the generator relative to the magnetic lines of flux it is cutting through (When produced by a 60 cps or 60 Hz generator, in the US) Slide 3 1. A period 2. Velocity: the speed of light in a vacuum, which is constant for all EM radiation. And frequency, which is greater at higher energies. 3. Frequency for energy, and amplitude for kVp.