17. The __ filters out the nonpenetrating, longer wavelength x-rays. a. Aluminum disks b. Lead collimator c. Cathode d. Anode A B C D 18. The __ or negative electrode consists of a tungsten wire filament. a. Anode b. Cathode A B 19. The tungsten target & copper stem is part of the __ a. Anode b. Cathode A B

17. **A** - Aluminum disks filter out the nonpenetrating, longer wavelength x-rays. The other options are involved in x-ray production but not filtration.<br /><br />18. **B** - The **Cathode** is the negative electrode and consists of a tungsten wire filament. The anode is the positive electrode.<br /><br />19. **A** - The tungsten target and copper stem are part of the **Anode**. The anode is where the x-rays are produced when electrons from the cathode strike the tungsten target.<br />