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two identical charged balls are suspended from the samepoint by two massless identical thread of density of each ball is rho if system is immersed in a medium of density sigma ball remain undeflected then dielectric constant of medium is?

two identical charged balls are suspended from the samepoint by two massless identical thread of density of each ball is rho if system is immersed in a medium of density sigma ball remain undeflected then dielectric constant of medium is?

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Grade:12

1 Answers

Rohit Ashiwal
28 Points
6 years ago
Ans is option 1. Assume that they were hanging while making some angle @ with the vertical. Find tan@ by balancing forces. Now this @ does not changes according to question, so by introducing bouyant force and change in electric force because of dielectric, again balance forces and find tan@. Equate these tan@s and you will get option 1 as answer.

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