question_answer

Two spherical bobs of same mass and radius having equal charges are suspended from the same point by strings of same length. The bobs are immersed in a liquid of relative permittivity \[{{\in }_{r}}\]and density\[{{\rho }_{o}}\]. Find the density \[\rho \] of the bob in \[g/c{{m}^{3}}\]for which the angle of divergence of the strings to be the same in the air and in the liquid\[\left( {{\varepsilon }_{r}}=3,{{\rho }_{0}}=2g/c{{m}^{3}} \right)\]?

Answer:

3.00