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10 questions · timed · auto-graded

MCQ 11 Mark
The atmospheric pressure on earth's surface is approximately
  • $10^5 Pa$
  • B
    $10^4 Pa$
  • C
    $9.6 \times 10^4 N / m ^2$
  • D
    $10^{-4} Pa$
Answer
Correct option: A.
$10^5 Pa$
a
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MCQ 21 Mark
Pressure at a point inside a liquid does not depend on :
  • A
    The depth of the point below the surface of the liquid
  • B
    The nature of the liquid
  • C
    The acceleration due to gravity at that point
  • The shape of the containing vessel
Answer
Correct option: D.
The shape of the containing vessel
d
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MCQ 31 Mark
The pressure exerted by $\left.5 0 ~ kg ~ ( g = 1 0 m / s ^2\right)$ on an area of cross section of $2 m^2$ is :
  • A
    50 Pa
  • B
    200 Pa
  • 250 Pa
  • D
    1000 Pa
Answer
Correct option: C.
250 Pa
(c)
250 Pa
Explanation: $m =50 kg ; g =10 ms^{-2}$
Area of cross-section $=A=2 m^2$
$
\text { Pressure }=P=\frac{F}{A}=\frac{mg}{A}=\frac{50 \times 10}{2}=250 Pa
$
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MCQ 41 Mark
A dam for water reservoir is built thicker at the bottom than at the top because :
  • pressure of water is very large at the bottom due to its large depth
  • B
    water is likely to have more density at the bottom due to its large depth
  • C
    quantity of water at the bottom is large
  • D
    variation in value of ' $g$ '
Answer
Correct option: A.
pressure of water is very large at the bottom due to its large depth
a
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MCQ 51 Mark
As we move upwards, the atmospheric pressure:
  • A
    increases
  • decreases
  • C
    remains same
  • D
    cannot be said
Answer
Correct option: B.
decreases
b
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MCQ 61 Mark
Pressure applied in liquids is transmitted with undiminished force:
  • A
    in downward direction
  • B
    upward direction only
  • C
    sides of containing vessel
  • in all directions
Answer
Correct option: D.
in all directions
d
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MCQ 71 Mark
Thrust acting perpendicularly on the unit surface area is called:
  • pressure
  • B
    moment of force
  • C
    down thrust
  • D
    none of these
Answer
Correct option: A.
pressure
a
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MCQ - PHYSICS STD 9 Questions - Vidyadip