A thin film of liquid is formed in a rec...

A thin film of liquid is formed in a rectangular frame of wire and a light slider supports a weight of `(2.5 * 10^-2)N`.The length of slider is 20cm and its weight negligible. The surface tension is liquid is

`6.25*10^-2 Nm^-1`

`12.5*10^-2 Nm^-1`

`25*10^-2 Nm^-1`

`2.5*10^-2 Nm^-1`

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