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Q.

Radius of a capillary is 2×10−3m.  A liquid of weight  6.28×10−4N may remain in the capillary then the surface tension of liquid will be

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a

5×10−3N/m

b

5×10−2N/m

c

5N/m

d

50N/m

answer is B.

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Detailed Solution

T=F2πr=6.28×10−42×3.14×2×10−3=5×10−2N/m
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