Question

What is Venturimeter.State the principle of its working,Derive an expression to find the rate of liquid flowing through a pipe​

Answer 1

 device for measuring fluid flow, consisting of a tube so constricted that the pressure differential produced by fluid flowing through the constriction gives a measure of the rate of flow. 2. Also called: venturi. a tube with a constriction used to reduce or control fluid flow, as one in the air inlet of a carburettor.

venturimeter is based on Bernoulli theorem
●expression is in the photo●
hope it will help you