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Question 6497
NEET Physics · Hard

Mechanical Properties of Fluids: Capillarity MCQ

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CapillarityHardQuestion 6497

Question

Water rises 10 cm in capillary (T=0.07 N/m, θ=0°, r=?). If ρ=1000, g=10:
  1. A
    0.014 mm
  2. B
    0.14 mm
    Correct
  3. C
    1.4 mm
  4. D
    14 mm

Correct answer

0.14 mm

Explanation

h = 2Tcosθ/ρgr. r = 2×0.07/(1000×10×0.1) = 0.14/1000 = 0.00014 m = 0.14 mm.

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