Answer the following statement(s) true (T) or false (F)

Question

1. The real key to success in math is to fully understand the underlying concepts or principles from which mathematical formulas are derived.
2. Coulomb’s law describes the relationship of electrical charges and distance.
3. A decrease in SID will require an increase in mAs to maintain radiographic density between the two images taken at different SIDs.
4. kVp is the controlling factor for density and an influencing factor for radiographic contrast.
5. The 15% rule states that a 15% increase in kVp will result in a decrease in radiographic contrast and a doubling of radiographic density.

Answer 1

1. TRUE Understanding the why and how of a concept will significantly help the student to apply the correct formulas.
2. TRUE Coulomb discovered that creating distance between two electrical charges greatly affected the electrostatic force between the two electrical charges.
3. FALSE When SID increases, there should be a decrease in mAs to maintain the same radiographic density.
4. fALSE kVp is the controlling factor for contrast and an influencing factor for radiographic density.
5. TRUE Increasing or decreasing the kVp will produce the same change in density as doubling or halving the mAs.