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NEET 2020 (Phase 2) · Pressure in a Fluid

Pressure in a Fluid question from NEET 2020 (Phase 2)

Q17NEET 2020 · PHASE 2Easy

Pressure in a Fluid

A barometer is constructed using a liquid (density = $760\text{ kg/m}^{3}$ ). What would be the height of the liquid column, when a mercury barometer reads 76 cm?

(density of mercury = $13600\text{ kg/m}^{3}$ )

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Answer: (c)

Both barometers balance the same atmospheric pressure: $h_L\rho_L g = h_{Hg}\rho_{Hg} g$ .
$h_L = \dfrac{0.76\times13600}{760} = 13.6\text{ m}$
So the answer is (c) 13.6 m.

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