25. In a capillary tube, water rises by 1.2 mm. The height of water that will rise in another capillary tube having half the radius of the first, is
(a) 1.2 mm
(b) 2.4 mm
(c) 0.6 mm
(d) 0.4 mm
Ans. b
(7)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)