Question

The filament of an electric bulb draws a current of 0.4 ampere. Calculate the amount of charge flowing through the filament if the bulb glows for 2 hours. Also calculate the number of electrons passed.

Answer 1

Here I =0.4 amp and t=2hr or 2×60×60 sec
We known I=nQ/t where Q is charge and n is no of charge.
n=It/Q
0.4x(2x60x60)/1.6x10^-19