A water film is formed between two straight parallel wires of 10 cm le – McqOptions

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1.	A water film is formed between two straight parallel wires of 10 cm length 0.5 cm apart. If the distance between wires is increased by 1 mm. What will be the work done? (surface tension of water \[=72dyne/cm\] )
A.	36 erg
B.	288 erg
C.	144 erg
D.	72 erg
Answer» D. 72 erg

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