A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.

Question

A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.

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bonexptip 5 months 2021-08-09T07:17:17+00:00 2 Answers 6 views 0

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    0
    2021-08-09T07:18:26+00:00

    Answer:

    600 mC

    Explanation:

    The charge of an electron is 1.6 x 10-19C so for a current with 10 mA, the charge going to screen in one second is 10 mC


    so number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016  so in a minute the charge is 10 * 60 = 600 mC

    0
    2021-08-09T07:19:16+00:00

    Answer:

    Total charge, q = It = 10 A x 60 s = 600 C

    We know that, q = ne

    So no. of electrons, n = q/e = 600 / (1.6×10-19) = 375×1019

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