24. The work done in blowing a soap bubble of 10 cm
radius is (Surface tension of the soap solution is (3/100) N/m)
(a) 75.36 x 10-4 joule
(b) 37.68 x 10-4 joule
(c) 150.72 x 10-4 joule
(d) 75.36 joule
Ans. a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a