41. Radius of a soap bubble is increased from R to 2R work done in this process in terms of surface tension is
(a) 24πR2S (b) 48 πR2S
(c) 12πR2S (d) 36πR2S
Ans. a
(6)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)