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PHYSICS MCQ

Upthrust and Archimedes principle · ICSE STD 9 (ICSE - English Medium). 10 questions.

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10 questions · timed · auto-graded

MCQ 11 Mark
A body has density $9.6 gcm - s$. Its density in SI system is :
  • A
    $96 kgm ^2$
  • B
    $960 kgm ^2$
  • C
    $9600 kgm ^{-3}$
  • D
    $96,000 kgm ^2$
Answer
(c)
Explanation:
Density $=9.6 g cm ^2$
$
=\frac{9.6}{10^3} \times 10^6 kgm^{-3}=9600 kgm^{-3}
$
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MCQ 21 Mark
The ratio between the mass of a substance and the mass of an equal volume of water at $4^{\circ} C$ is called:
  • ✓
    relative density
  • B
    density
  • C
    weight
  • D
    pressure
Answer
Correct option: A.
relative density
a
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MCQ 31 Mark
When a body is wholly or partially immersed in a liquid, it experiences a buoyant force which is equal to:
  • A
    volume of liquid displaced by it
  • ✓
    weight of liquid displaced by it
  • C
    both (a) and (b)
  • D
    none of the above
Answer
Correct option: B.
weight of liquid displaced by it
b
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MCQ 41 Mark
The SI unit of density is :
  • A
    $gem ^2$
  • B
    $kgem ^{-2}$
  • ✓
    $kgm ^{-3}$
  • D
    $gm ^{-2}$
Answer
Correct option: C.
$kgm ^{-3}$
c
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MCQ 51 Mark
When an object sinks in a liquid, its :
  • A
    buoyant force is more than the weight of object
  • ✓
    buoyant force is less than the weight of object
  • C
    buoyant force is equal to the weight of the object
  • D
    none of the above
Answer
Correct option: B.
buoyant force is less than the weight of object
b
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MCQ 61 Mark
The phenomenon due to which a solid experiences upward force when immersed in water is called:
  • A
    floatation
  • ✓
    buoyancy
  • C
    density
  • D
    none of these
Answer
Correct option: B.
buoyancy
b
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MCQ 71 Mark
The apparent weight of a body in a fluid is :
  • A
    equal to weight of fluid displaced
  • B
    volume of fluid displaced
  • ✓
    difference between its weight in air and weight of fluid displaced
  • D
    none of the above
Answer
Correct option: C.
difference between its weight in air and weight of fluid displaced
c
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MCQ 81 Mark
With the increase in the density of the fluid, the upthrust experienced by a body immersed in it:
  • A
    decreases
  • ✓
    increases
  • C
    remains same
  • D
    none of these
Answer
Correct option: B.
increases
b
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MCQ 91 Mark
When a body is floating in a liquid:
  • A
    The weight of the body is less than the upthrust due to immersed part of the body
  • B
    The weight of body is more than the upthrust due to the immersed part of the body
  • ✓
    The weight of body is equal to the upthrust due to the immersed part of the body
  • D
    none of the above
Answer
Correct option: C.
The weight of body is equal to the upthrust due to the immersed part of the body
c
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MCQ 101 Mark
The force experienced by a body when partially or fully immersed in water is called:
  • A
    aparent weight
  • ✓
    upthrust
  • C
    down thrust
  • D
    none of these
Answer
Correct option: B.
upthrust
b
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