7. Two capillary tubes P and Q are dipped in water. The height of water level in capillary P is 2/3 to the height in Q capillary. The ratio of their diameters is
(a) 2 : 3
(b) 3 : 2
(c) 3 : 4
(d) 4 : 3
Ans. b
(12)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)