V1 and V2 are the velocities of flow before and after sudden enlargement in a pipe. The loss of head as given by Borda equation would be
1
\(\rm\frac{V_1^2-V_2^2}{2 g}\)
2
\(\rm\frac{V_1^2-V_2^2}{g}\)
3
\(\rm\frac{V_2^2-V_1^2}{2 g}\)
4
\(\rm\frac{V_2^2-V_1^2}{g}\)
5
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