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Homework Help: Calculate rate?

  1. Mar 23, 2008 #1
    An X-ray tube operating at 65kV has a tube current of 120mA. The tube produces X-ray with an efficiency of 0.8%

    calculate the rate of heat production in the anode

    rate = ?

    I really dont get this question, anyone?
  2. jcsd
  3. Mar 23, 2008 #2
    oH come on....someone knows the answer, or at least guide me! its bugging me not knowing.
  4. Mar 23, 2008 #3


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    Staff Emeritus
    Science Advisor

    OK, one has voltage (65 kV) and current (120 mA), and voltage * current is power. Power is a rate of energy (production/transfer).

    If X-rays are only 0.8% of the energy (0.008), then 0.992 of the energy/power goes into heating the anode.
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