Anorton ac equivalent circuit always consists of

(a) an equivalent ac current source in series with an equivalent impedance
(b) an equivalent ac current source in parallel with an equivalent reactance
(c) an equivalent ac current source in parallel with an equivalent impedance
(d) an equivalent ac voltage source in parallel with an equivalent impedance

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)