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Pressure in Fluids and Atmospheric Pressure PHYSICS - Pressure in Fluids and Atmospheric Pressure

ICSE - STD 9 - PHYSICS (ICSE - English Medium). 104 questions in this chapter.

Question types

Pressure in Fluids and Atmospheric Pressure question types

104 questions across 6 question groups — pick any mix to generate a PHYSICS paper with step-by-step answer keys.

104
Questions
6
Question groups
5
Question types
Sample Questions

Pressure in Fluids and Atmospheric Pressure questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
The atmospheric pressure at earth's surface is $P_1$ and inside mine is $P_2$. They are related as :
  • A
    $P_1=P_2$
  • B
    $P_1>P_2$
  • ✓
    $P _1< P _2$
  • D
    $P_2=0$

Answer: C.

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Q 2MCQ1 Mark
The normal atmospheric pressure is :
  • A
    $76\ m$ of $Hg$
  • ✓
    $76\ cm$ of $Hg$
  • C
    $76\ Pa$
  • D
    $76\ N m ^{-2}$

Answer: B.

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Q 3MCQ1 Mark
The unit torr is related to the barometric height as :
  • A
    $1$ torr $= l\ cm$ of $Hg$
  • B
    $1$ torr $= 0.76\ m$ of $Hg$
  • ✓
    $1$ torr $= 1\ mm$ of $Hg$
  • D
    $1$ torr $= 1m$ of $Hg$

Answer: C.

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Q 4MCQ1 Mark
The pressure $P_1$ at the top of a dam and $P_2$ at a depth $h$ form the top inside water $($density $p )$ are related as :
  • A
    $P_1>P_2$
  • B
    $P_1=P_2$
  • C
    $P_1-P_2=h \rho g$
  • ✓
    $P_2-P_1=h \rho g$

Answer: D.

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Q 5MCQ1 Mark
The pressure $P_1$ at a certain depth in river water and $P_2$ at the same depth in sea water are related as :
  • A
    $P_1>P_2$
  • B
    $P_1=P_2$
  • ✓
    $P_1<P_2$
  • D
    $P_1-P_2=$ atmospheric pressure

Answer: C.

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Q 17[3 Mark Question Answer]3 Marks
QUESIION Assuming the density of air to be $1.295 kg m ^{-3}$, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury $=13.6 \times 10^3 kg m ^{-3}$.
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Q 18[3 Mark Question Answer]3 Marks
 At sea level, the atmospheric pressure is $1.04 \times 10^5$ Pa. Assuming $g =10 m s ^{-2}$ and density of air to be uniform and equal to 1.3 $kg m ^{-3}$, find the height of the atmosphere.
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Q 19[3 Mark Question Answer]3 Marks
At sea level, the atmospheric pressure is 76 cm of Hg. If air pressure falls by 10 mm of Hg per 120m of ascent, what is the height of a hill where the barometer reads 70 cm Hg. State the assumption made by you.
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