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NEET 2024

NEET 2024 Physics question on Properties of Matter

A thin flat circular disc of radius 4.5 cm4.5\ \text{cm} is placed gently over the surface of water. If surface tension of water is 0.07 N m−10.07\ \text{N m}^{-1}, then the excess force required to take it away from the surface is:
  1. A.
    1.98 mN1.98\ \text{mN}
  2. B.
    99 N99\ \text{N}
  3. C.
    19.8 mN19.8\ \text{mN}
  4. D.
    198 N198\ \text{N}
Show answer

Correct option: C

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