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An x-ray tube operates at 60 kV and the current through it is 4.0 mA. Calculate the, (a) Number of electrons striking the target per...

      

An x-ray tube operates at 60 kV and the current through it is 4.0 mA. Calculate the, (a) Number of electrons striking the target per second. (b) Speed of the electrons when they hit the target.

  

Answers


Mutiso
a) Current through the tube is given by I = ne, where n- number of electrons striking target per second and e- electronic charge ( e = 1.6 × 10-19coulombs) So, n = 1/e = (4.0 × 10-3) / 1.6 × 10-19 = 2.5 × 1016 electrons.
b) Kinetic energy = electrical energy ½ mev2 = eV, then v =$\sqrt{\frac {2ev}{me}}$ = 2.13 × 108 m/s.
Mutiso answered the question on October 16, 2018 at 19:11


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