^{HI THIS WAS GIVEN FOR US AS AN EXERCISES FOR OUR UPCOMING EXAMS NEXT WEEK.. I HOPE YOU CAN HELP ME.. AND IN RETURN I PROMISE TO GIVE HELPFUL RATING WITH ANY OF YOUR ANSWER}

In a particular cathode ray tube, the measured beam current is 30.0 uA. How many electrons strike the tube screen every 40.0 s? O 7.8 X 10'1 5 electrons O 8.5 X 10'1 5 electrons O 7.5 X 10'1 5 electrons O 9.0 X 10'1 5 electrons