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U (c) 10:1 TULIVU Q 24. A film of water ...

U (c) 10:1 TULIVU Q 24. A film of water is formed between two straight parallel wires of length 10 cm each separated by 0.5 cmn. If their separation is increased by 1 mm while still maintaining their parallelism, how much work will have to be done (Surface tension of water = 7.2 x 10 N/m) (a) 7.22 x 10-1 (b) 1.44 x 10 (c) 2.88 x 10 (d) 5.76 x 10 innal film of Sop solution. On it a thread (a) 10.49 MN (6) 10.8x mN (c) 0.8 mN (d) 4.8 MN Q 30. The surface tension of water is 75 dync/cm. Find the minimum vertical force required to pull a thin wire ring up (refer figure) if it is initially resting on a horizontal water surface. The circumference of the ring is 20 cm

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