A capillary tube of radius 0.1mm is dipped in water (S\=0.073N/m, ρ\=1000kg/m3). What is the height of capillary rise? (
Capillary rise: h = 2Scosθρga. S = 0.073N/m, ρ = 1000kg/m3, g = 10m/s2, a = 0.1×10−3m, cosθ = 1. h = 2×0.0731000×10×0.1×10−3 = 0.146m = 14.6cm. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 14.6 cm. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.