Asked by jibril

an x ray tube operate at 20kv and the current through it is 5mA.
determine
1 number of electrons striking the target per second
2 the speed of electrons when they hit the target
Answered by bobpursley
number=current/e
where e is the charge per electron

speed:
1/2 mv^2=20E3*e
m is mass of electron
solve for v
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