PQRS is a rectangular frame of copper wi...

PQRS is a rectangular frame of copper wire shown in figure the side RS of the frame is movable. If a soap film is formed on it then what is the diameter of the wire to maintain equilibirum (given surface tension of soap solution `=0.045N//m` and density of copper `=8.96xx10^(3)kg//m^(3))`

0.6 mm

0.6mm

1.2 mm

1.2 cm

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