AP and TS EAMCET Engineering Model Paper 9

A horizontal composite capillary tube has a radius ’2r’ for a length ’2L' and radius V for a length ’L' as shown and is connected to a tank at one end and left free at the other end. The tank contains a liquid of coefficient of viscosity ' T|'. If a constant pressure difference ’P' exists across the ends of the capillary tube, the volume flux through the capillary tube is