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Calculate rate?

by ella_101
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ella_101
#1
Mar23-08, 11:03 AM
P: 8
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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ella_101
#2
Mar23-08, 12:49 PM
P: 8
oH come on....someone knows the answer, or at least guide me! its bugging me not knowing.
Astronuc
#3
Mar23-08, 02:51 PM
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Quote 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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