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A conductor has a non-uniform section as shown in the figure. A steady current is flowing through it. Then the drift speed of the electrons

$\begin {array} {1 1} (1)\;varies\: unpredictably & \quad (2)\;increases \: from\: P\: to\: Q \\ (3)\;decreases\: from\: P\: to\: Q & \quad (4)\;is\: constant\: throughout\: the\: wire \end {array}$


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(3) decreases from P to Q
answered Nov 7, 2013 by pady_1

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