A metal wire of length 120 cm and area of cross-section $1.8\times10^{-6}m^{2}$ is carrying a current of 2 A. If the number of free electrons per unit volume in the wire is $6.25\times10^{28}m^{-3}$, then the time taken by an electron to drift from one end to the other end of the wire (in hours) is}
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Electrons drift very slowly inside conductors although electrical signals propagate nearly at the speed of light.