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1.6mA flows through a conductor.if chage on an electron is -1.6*10 to the power -19coulomb,find the number of electrons tht will pass each second trough the cross section of tht conductor

Asked by Rohan 18th October 2017, 11:13 PM
Answered by Expert
Current I = Q × t, where I is in Amphere, Q is in couloumb and t is in seconds
hence Q = I/t;
per unit second   Q = I = 1.6 × 10-3  mC.
This charges flow are flow of electrons.
Hence this total charge is divided by electronic charge we get number of electrons.
begin mathsize 12px style n subscript e equals space fraction numerator 1.6 cross times 10 to the power of negative 3 end exponent over denominator 1.6 cross times 10 to the power of negative 19 end exponent end fraction space equals space 10 to the power of 16 end style 
Answered by Expert 20th October 2017, 10:40 AM
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