A TV set shoots out a beam of electrons. The beam current is10 A. How many electrons strike the TV screen in each second? How muchcharge strikes the screen in a minute?
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Monika37114:
what is n here
no. of electrons
oo
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Explanation:
The charge of an electron is 1.6 x 10-19C. Thus for a current of 10 mA, the charge going to screen in one scond is 10 mC thus number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016 In a minute charge striking the screen = 10 * 60 = 600 mC
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