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Question

Heat at the rate of 200 W is produced in an X-ray tube operating at 20 kV. Find the current in the circuit. Assume that only a small fraction of the kinetic energy of electrons is converted into X-rays.


Solution

Heat produced/sec = 200 W

neVt = 200

net V = 200

i=200V

= 20020×103 = 10 mA 

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