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A soap bubble of radius r and surface te...

A soap bubble of radius r and surface tension T is given a potential V. Show that the new radius R of the bubble is related with the initial radius by the equation
`P(R^(3) -r^(3)) +4T (R^(2)-r^(2)) = (in_(0)V^(2)R)/(2)` where P is the atmospheric pressure.

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PHYSICS GALAXY - ASHISH ARORA-ELECTROSTATICS-Unsolved Numberical Problems
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  2. A small sphere is charged uniformly and placed at point A (u, v) so th...

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  3. The electric intensity Eat a point on the axis ofa ring of radius a at...

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  4. Two long wires each oflength I are placed on a smooth horizontal table...

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  5. Four charges +50 xxI0^(-9)C, -12 xx I0^(-19)C, + 36 xx I0^(-9)C " and ...

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  6. A solid conducting sphere of radius R is placed in a uniform electric ...

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  7. Suppose in an insulating medium, having di-electric constant k= 1, vol...

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  9. Two long straight parallel wires carry charges lambda(1) and lamda(2) ...

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  11. Two short electric dipoles having dipole moment p(1)" and "p(2) are ...

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  12. Three identically charged, small spheres each of mass m are suspended ...

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  13. Two horizontal parallel conducting plates are kept at a separation d =...

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  14. A small cork ball A of mass m is suspended by a thread of length I. An...

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  15. A particle of mass m having negative charge q moves along an ellipse a...

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  16. Two concentric spheres of radii R and 2R are charged. The inner sphere...

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  17. A charged particle of radius 5xx10^(-7)m is located in a horizontal el...

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  18. Two small balls having the same mass and charge and located on the sam...

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  19. What is the percentage change in distance if the force of attraction b...

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  20. two concentric rings of radii r and 2rare placed with centre at origin...

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