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Math Help - calculate rate?

  1. #1
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    calculate rate?

    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 = ?
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  2. #2
    Super Member Aryth's Avatar
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    The only formula I know for this is the one for Heat Units Per Second, or how much electrical energy is converted to heat in a second... The formula is:

    Heat = kV_p*mA

    So:

    Heat = 65*120

    Heat = 7800 \frac{HU}{s} (HU = Heat Units)

    Here's a nifty Conversion Factor:

    HU = 1.4 J
    Last edited by Aryth; March 23rd 2008 at 11:53 AM.
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