1. What is the purpose of the focusing cup?

2. What is the electric charge of the focusing cup and why is this important?

3. The larger the anode angle, the smaller the anode heel effect?  True or False

4. What are the two types of Anodes?

5. The anode rotates inside the x-ray tube by an _________  motor?

6. The most common tube failure is electrons streaming from the filament to the enclosure due to vaporized tungsten?   True or False

7. X-rays are produced isotropically, AND this means that they are emitted in a straight line?

a. First part true, second part false

b. First part false, second part true

c. Both parts true

d. Both parts false

8. The protective housing of the x-ray tube protects from ________ and _________?

9. Why do x-ray tubes mostly use a rotating anode?

10. Most of the x-ray tubes heat is dissipated by?

a. convection

b. conduction

c. radiation

answers:  1. The purpose of the focusing cup is to focus the x-ray beam so that the x-ray beam is focused on a smaller area of the target.  2. The focusing cup is negatively charged because the charge of an electron is also negative, this helps keep the electrons focused inside the focusing cup. 3. True  4. Rotating and stationary. 5. Induction  6. True  7. A.  isotropically- means emitted in all directions. 8. Radiation exposure and electrical shock.  9. Most tubes use an rotating anode because it allows the electron stream to interact with more of the target area. 10. c