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calculate rate?

 
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Mar23-08, 11:03 AM   #1
 

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 = ?


I really dont get this question, anyone?
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Mar23-08, 12:49 PM   #2
 
oH come on....someone knows the answer, or at least guide me! its bugging me not knowing.
Mar23-08, 02:51 PM   #3
 
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Quote by ella_101 View Post
An X-ray tube operating at 65kV has a tube current of 120mA. The tube produces X-ray with an efficiency of 0.8%
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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