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## Homework Statement

A beam of electrons leaves an electrom gun. The current carried by the beam is 4mA. a) How many coulombs of charge pass through a certain point in the beam per second. b) How many electrons pass this point per second?

## Homework Equations

KE(j) = Charge of electrons (e) X Accelerating voltage (V)

## The Attempt at a Solution

I need to find coulombs, and when only given '4mA' i do not see how i can work this out. I have my exam tomorrow afternoon and need to try to get this cleared up, please help =S

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