Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Properties of Matter question

2023 · Q159
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Properties of Matter
  5. /2023 · Q159

Properties of Matter question

2023 · Q159

NEETPhysicsProperties of MatterMCQ+4 / −1

The viscous drag acting on a metal sphere of diameter 1 mm1 \mathrm{~mm}1 mm, falling through a fluid of viscosity 0.8 Pa0.8 \mathrm{~Pa}0.8 Pa s with a velocity of 2 m s−12 \mathrm{~m} \mathrm{~s}^{-1}2 m s−1 is equal to :

  1. A
    15×10−3 N15 \times 10^{-3} \mathrm{~N}15×10−3 N
  2. B
    30×10−3 N30 \times 10^{-3} \mathrm{~N}30×10−3 N
  3. C
    1.5×10−3 N1.5 \times 10^{-3} \mathrm{~N}1.5×10−3 N
  4. D
    20×10−3 N20 \times 10^{-3} \mathrm{~N}20×10−3 N
View written solutionFree

Correct answer: A

$$ \begin{aligned} & F=6 \pi \mathrm{r} \eta v \\ & =(6)(3.14)\left(\frac{1 \times 10^{-3}}{2}\right)\left(0.8 \times 10^{-1}\right)(2) \\ & =1.5 \times 10^{-3} \mathrm{~N} \end{aligned} $$

PreviousNext

More from Properties of Matter

  • The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly: (surface tension of soap solution =0.03 N m−1 )2023 · MCQ
  • The venturi-meter works on :2023 · MCQ
  • Let a wire be suspended from the ceiling (rigid support) and stretched by a weight W attached at its free end. The longitudinal stress at any point of cross-sectional area A of the wire is :2023 · MCQ
  • Two copper vessels A and B have the same base area but of different shapes. A takes twice the volume of water as that B requires to fill upto a particular common height. Then the correct statement among the following is :2022 · MCQ
  • The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s−1. If the viscosity of oil at room temperature is 0.9 kg m−1 s−1, the viscous drag force is :2022 · MCQ
  • A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball (v) as a function of time (t) is Includes diagram2022 · MCQ
  • If a soap bubble expands, the pressure inside the bubble2022 · MCQ
  • Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The stretching of a spring is determined by the shear modulus of the material of the spring. Reason (R) : A coil…2022 · MCQ