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any tips on part b?

so 2.8x10-6 / 1.6x10-19 for part a?

q= C - coloumbs t= s- seconds meaning charge A = C/s which equation would i use to put this into ?

current = rate of flow of charge I=q/t but I am not sure how to use the information in the question in this context?

Homework Statement The beam of electrons in a cathode ray tube contains electrons traveling at 8.4x106 ms-1 and the current throgh the tube is 2.8 micro A. a) how many electrons are emitted per second from the cathode of the tube b) what is the number of electrons per unit length of the beam...

what are the calculated answers to this question?