CBSE Class 12-science Answered
How does the drift velocity of electrons in a metallic conductor change if the length of the conductor is doubled and the applied voltage is kept constant ?
Asked by Thomas Albin | 23 Sep, 2012, 11:35: AM
Expert Answer
drift velocity:vd=eEtao/m where, tao(?)=relaxation time,e=charge of one electron, E=electric field
E=V/l V=potential difference, l=length of conductor
so,
vd=eEtao/m =eV?/ml
so
if the length of the conductor is doubled and the applied voltage is kept constant,
if the length of the conductor is doubled and the applied voltage is kept constant,
then the drift velocity of electrons in a metallic conductor will be half as drift vel of electrons are inversely proportional to the length of the conductor.
Answered by | 24 Sep, 2012, 10:49: AM
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