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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

(18)

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