At the ends of vertical tubes of siphon there is atmospheric pressure. AND there is different height of water column above it so there is pressure difference at two ends of upper horizontal pipe.HERE we cant consider NON IDEAL NATURE OF FLUID then HOW SIR we can explain pressure difference at the two ends of upper horizontal pipe on the bases of EQUATION OF CONTINUITY and BERNOULLI EQUATION

Dear Amrit

IF you will consider the ideal case .and cross section are of pipes are constant then in the horizontal section of piper velocity and pressure will be same.

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