how many electrons pass through a lamp in 1 minute if I=300mA

Asked by jigyasa dwivedi | 24th May, 2012, 09:51: PM

Expert Answer:

  1. Here, current I = 300 mA = 0.3 A

       time t = 1 minute = 60 seconds

    Now, charge Q = I x t = 0.3 x 60 = 18 coulomb

    and no. of electrons = (total charge)/(charge on 1 electron)

        ? no. of electrons = (18)/(1.6 x 10-19)

                        = 1.125 x 1020 electrons 

Answered by  | 25th May, 2012, 06:32: AM

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