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Week 8 Exam Review
Weeks 5-7
| Question | Answer |
|---|---|
| Approximately _____ of the kinetic energy of electrons from the cathode is converted to heat. | 1% |
| Characteristic x-rays are emitted when an _________ electron fills an _________ void. | outer-shell; inner-shell |
| A change in mA or mAs results in a proportional change in the ________ of the x-ray emission spectrum at all energies. | Amplitude |
| The amplitude of the emission spectrum with a _________ generator is __________ it is with a three-phase generator. | single-phase; lower than |
| How does added filtration affect the emission spectrum? | Reduced amplitude and a shift to the right |
| A 15% increase in kVp is equivalent to ___________________. | doubling the mAs |
| The inverse square law states that the intensity of electromagnetic radiation is ________ related to the ______ of the distance from the source. | inversely; square |
| Visible light is identified by __________ and x-rays are identified by ___________. | wavelength; energy |
| At a given velocity, wavelength and frequency are _____________ proportional. | inversely |
| ________ is the number of wavelengths that pass a point of observation per second. | Frequency |
| __________ is the distance from one crest to another, from one valley to another, or from any point on the sine wave to the next corresponding point. | Wavelength |
| An x-ray photon is a quantum of __________ energy. electromagnetic | electromagnetic |
| The force between magnetic poles is proportional to the ________ of the magnetic pole strengths, divided by the ________ of the distance between them. | product; square |
| Electrodynamics is the study of __________ electric charges. | mobile |
| The magnetic intensity of an electromagnet is greatly increased by the addition of a(n) __________ core. | iron |
| Water is a ___________ material. | diamagnetic |
| Like magnetic poles ________ and unlike magnetic poles ________. | repel; attract |
| The autotransformer has one winding and varies with ________ and __________. | voltage; current |
| A conductor is any substance through which electrons _____ flow while an insulator is any material that _____ allow electron flow. | easily; does not |
| According to Faraday’s law, the magnitude of the induced electric current depends on which factor? | Strength of the magnetic field |
Created by:
bmairet