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CBSE Class 12-science Answered

Compare drift velocity
Asked by | 27 Jul, 2008, 03:59: PM
Expert Answer

Using the given formula , take the ratio of drift velocities  for two wires

v = e V T / ml  ; v = drift velocity , V = pot. difference , t = av. relaxation time , m = electronic mass , l = length

then substitute V = ml i / nae2

In case of series , current will be same , hance factor, 'i' will get cancelled.

in case of parallel , replace 'i' accordingly , using ohm's law.

Answered by | 28 Jul, 2008, 12:14: AM
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