Question
24. When the voltage is increased: a. Electrons move from the anode to the cathode with more speed b. Photons move from the anode to the cathode with more speed c. Electrons move from the cathode to the anode with more speed d. Photons move from the cathode to the anode with more speed A B C D 25. The kVp represents: a. The mean x-ray tube voltage b. The mean filament voltage c. The maximum or peak voltage of an alternating current d. The maximum or peak voltage of a direct current A B C D
Solution
4
(193 Votes)
Amelia
Master ยท Tutor for 5 years
Answer
24. **C. Electrons move from the cathode to the anode with more speed.***Explanation:* X-ray tubes work by accelerating electrons from a negatively charged cathode to a positively charged anode. A higher voltage difference between the cathode and anode results in a stronger electric field, which in turn accelerates the electrons to a higher velocity before they strike the anode. Photons (X-rays) are produced *at* the anode when the electrons collide with it, but the voltage doesn't directly affect their speed; photons always travel at the speed of light.25. **C. The maximum or peak voltage of an alternating current.***Explanation:* kVp stands for kilovolt peak. X-ray tubes typically use alternating current (AC), which fluctuates in voltage. The kVp setting controls the maximum voltage reached during this fluctuation. This peak voltage determines the maximum energy of the X-rays produced. While the average voltage is important, the kVp specifically refers to the peak value. Direct current (DC) would have a constant voltage, and while a peak voltage could theoretically be defined, it wouldn't be the fluctuating peak of AC.