A siphon draws water from a reservoir and discharges it out at atmospheric pressure. Assuming ideal fluid and the reservoir is large, the velocity at point P in the siphon tube is
1
\(\sqrt {2g{h_1}} \)
2
\(\sqrt {2g{h_2}} \)
3
\(\sqrt {2g({h_2} - {h_1})} \)
4
\(\sqrt {2g({h_2} + {h_1})}\)