a) Q = i*t
= 300*10^-6*10*10^-3
= 3*10^-6 C
b) no of elctrons = 3*10^-6/(1.6*10^-19)
= 1.875*10^13
Charge = current* time
Charge=(300*10^-6)*(10*10^-3)=3*10^-6 coloumb
Charge on 1 electron= 1.6*10^-19 coloumb
No of electron=3*10^-6/(1.6*10^-19)=1.875*10^13
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