The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

  • A[2(Vr - v) v]/ Vr² 
  • B[2(Vr + v) v]/ Vr²
  • C[(Vr - v) v]/ Vr
  • D[(Vr + v) v]/ Vr
Correct Answer : (A)

[2(Vr - v) v]/ Vr²


Hints :

According to Bernoulli's equation for steady ideal fluid flow


A Francis turbine is used when the available head of water is

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