A current I is passing through a wire having two sections P and Q of uniform diameters d and d/2, respectively. If the mean drift velocity of electrons in sections P and Q is denoted by νP and νQ respectively, then
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A current I is passing through a wire having two sections P and Q of uniform diameters d and d/2, respectively. If the mean drift velocity of electrons in sections P and Q is denoted by νP and νQ respectively, then