CBSE Class 12-science Answered
how many electrons pass through a lamp in 1 minute if I=300mA
Asked by jigyasa dwivedi | 24 May, 2012, 09:51: PM
Expert Answer
- 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 | 25 May, 2012, 06:32: AM
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