U-shaped film of a liquid is formed between a wire frame and movable wire 5 cm long. Then the force required to hold the wire in equilibrium is, (surface tension of liquid is 0.024 N/m) (a) 2.4 x 10 N (b) 24 x 103 N (c) 2.4 x 10 3 dyne (d) 24 x 103 dyne
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