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If the excess pressure inside a soap bub...

If the excess pressure inside a soap bubble is balanced by an oil column of height 2 cm, then the surface tension of soap solution will be(r=1cm , density of oil =0.8g/cm 3 ``)

A

3.9 N/m

B

`3.9 xx 10-^(2)` N/m

C

`3.9xx10^(-3)N//m`

D

`3.9xx10^(-1) N//m`

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