Effect of Gravity on Fluid Pressure and Pressure Due to a Fluid Column NEET Questions

Effect of Gravity on Fluid Pressure and Pressure Due to a Fluid Column MCQ Questions

13.
If a barometer is constructed using water instead of mercury (density of water = 1000 kg/m³, Pa = 1.013 × 10⁵ Pa, g = 9.8 m/s²), the height of the water column would be approximately:
A.
7.6 m
B.
10.3 m
C.
76 m
D.
0.76 m
ANSWER :
B. 10.3 m
14.
Pascal duplicated Torricelli's barometer using French wine of density 984 kg m⁻³. The height of the wine column for normal atmospheric pressure (Pa = 1.01 × 10⁵ Pa, g = 9.8 m/s²) is approximately:
A.
13.6 m
B.
7.6 m
C.
10.5 m
D.
9.6 m
ANSWER :
C. 10.5 m
15.
An open-tube manometer measures:
A.
Absolute pressure
B.
Gauge pressure (P − Pa)
C.
Atmospheric pressure
D.
Only very high pressures
ANSWER :
B. Gauge pressure (P − Pa)
16.
A diver is at a depth of 10 m below the surface of a lake. Given ρ_water = 1000 kg/m³, g = 10 m/s², Pa = 1.01 × 10⁵ Pa. The absolute pressure at that depth is:
A.
1.01 × 10⁵ Pa
B.
2.01 × 10⁵ Pa
C.
1.00 × 10⁵ Pa
D.
0.01 × 10⁵ Pa
ANSWER :
B. 2.01 × 10⁵ Pa
17.
The absolute pressure at a depth of 10 m in water is approximately 2 atm. This means the gauge pressure at that depth is:
A.
3 atm
B.
0.5 atm
C.
1 atm
D.
2 atm
ANSWER :
C. 1 atm
18.
A submarine is at a depth of 1000 m in an ocean (ρ_seawater = 1.03 × 10³ kg/m³, g = 10 m/s²). The gauge pressure on the submarine's hull is approximately:
A.
103 × 10⁵ Pa (≈ 103 atm)
B.
1030 × 10⁵ Pa
C.
1.03 × 10⁵ Pa (≈ 1 atm)
D.
10.3 × 10⁵ Pa (≈ 10 atm)
ANSWER :
A. 103 × 10⁵ Pa (≈ 103 atm)