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Question: Consider the barometer shown in figure. Density of mercury is r. A small hole is made at point S as ...

Consider the barometer shown in figure. Density of mercury is r. A small hole is made at point S as shown. The mercury comes out from this hole with speed v equal to –

A

2gh\sqrt{2gh}

B

2gH\sqrt{2gH}

C

2g(Hh)\sqrt{2g(H–h)}

D

None of thes

Answer

None of thes

Explanation

Solution

The mercury will not come out from this hole as the pressure

outside the tube (= atmospheric pressure) is greater than the pressure inside the tube (= rgh).

Here, r is the density of mercury.