A mercury manometer is used to measure the static pressure

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A mercury manometer is used to measure the static pressure at a point in a water pipe as shown in figure. The level difference of mercury in the two limbs is 10 mm. The gauge pressure at that point is

1. 1236 Pa
2. 1333Pa
3. Zero
4. 98 Pa

Correct Option: A

Height of water column over plate is H.
F = P × A = ρ gHA