The potential difference applied to an X-ray tube is 5 kV and the current through it is 3.2 mA. Then the number of electrons striking the target per second is
A. 2 x 1016
B. 5 x 1018
C. 1 x 1017
D. 4 x 105
Answer:A
The potential difference applied to an X-ray tube is 5 kV and the current through it is 3.2 mA. Then the number of electrons striking the target per second is
A. 2 x 1016 B. 5 x 1018 C. 1 x 1017 D. 4 x 105