36. When a capillary is dipped in water, water
When a capillary is dipped in water, water rises 0.015 m in it. If the surface tension of water is 75×10–3 N/m, the radius of capillary is
(a) 0.1 mm
(b) 0.5 mm
(c) 1 mm
(d) 2 mm
Ans. c
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a