We are able to obtain fairly large currents in a conductor …

Physics Current Electricity Electric Conduction, Ohm's Law, Electric Current, Potential Deffrence MCQ (Single Correct)

We are able to obtain fairly large currents in a conductor because

The electron drift speed is usually very large

The number density of free electrons is very high and this can compensate for the low values of the electron drift speed and the very small magnitude of the electron charge

The number density of free electrons as well as the electron drift speeds are very large and these compensate for the very small magnitude of the electron charge

The very small magnitude of the electron charge has to be divided by the still smaller product of the number density and drift speed to get the electric current

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The correct answer is:

is of order of few ,
A is of the order of , so a large I is due to a large value of n in conductors.

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