If a soap bubble, having radius r, is charged to a charge density `sigma` and its radius is increased to R, then R equal to___________[T is the surface tension].

A charged soap bobbe having surface charge density sigma and radius r. If the pressure inside and outsides the soap bubble is the same, then the surface tension of the soap solution is

A charged soap bobbe having surface charge density sigma and radius r. If the pressure inside and outsides the soap bubble is the same, then the surface tension of the soap solution is

A soap bubble has radius r The work done in increasing its radius to three times its original radius, without any rise of temperature, is (Given Surface tension of soap solution is T )

A soap bubble (surface tension T) is charged to a uniform charged density sigma . At equilibrium the radius of the bubble is given by (Nepsilon_(0)T)/(sigma^(2)) . The value of N is [Assume that atmosphere is not present]

A soap bubble of radius r is placed on another bubble of radius 2r . The radius of the surface common to both the bubbles is

A soap bubble of radius r is placed on another bubble of radius 2r . The radius of the surface common to both the bubbles is

A needle of length l and density rho will float on a liquid of surface tension sigma if its radius r is less than or equal to:

A needle of length l and density rho will float on a liquid of surface tension sigma if its radius r is less than or equal to:

Radius of a soap bubble is increased from R to 2 R work done in this process in terms of surface tension is