A thin wire is bent in the form of a ring of diameter `3.0cm`.The ring is placed horizontally on the surface of soap solution and then raised up slowly. Upward force necessary to break the vertical film formed between the ring and the solution is

A thin wire is bent in the form of a ring of diameter 3.0 cm . The ring is placed horizontally on the surface of soap solution and then raised up slowly . How much upward force is necessary to break the vertical film formed between the ring and the solution ? surface tension of a soap solution =3.0 xx 10^(-2) "Nm"^(-1).

A wire of some length is bent in the form of a ring of diameter 2a having self inductance L , then L will depend upon a as:

A wire of some length is bent in the form of a ring of diameter 2a having self inductance L , then L will depend upon a as:

A wire ring of 3cm redius is rested on the surface of a liquid and then reaised. The pull required is 3.03 g more before the film breaks than it is afterwards. Find the surface tension of the liquid.

A metal ring of internal and external radii 15 mm and 20 mm respectively is placed horizontally on the surface of a liquid of surface tension 0.03 N/m To detach the ring from the liquid surface the force required is

Energy required to form a soap bubble of diameter 20 cm will be (Surface tension for soap solution is 30 dynes/cm )

A thin wire of mass m and length l is bent in the form of a ring . Moment of inertia of that ring about an axis passing througfh its centre and perpendicular to its plane is