Cathode Ray

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In a particular cathode-ray tube, the measured beam current is 30.0 uA. How many electrons strike the tube scr?

In a particular cathode-ray tube, the measured beam current is 30.0 uA. How many electrons strike the tube screen every 40.0 seconds?

I need this with work please!

30 µA is 30 µC per second

30 µC per second x 40 sec = 1200 µC

1 C = 6.242e18 electrons

1200 µC x (6.242e18 electrons / C) x (1/1e6µ) = 7.49e15 electrons

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