Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of 37° with each other. When suspended in a liquid…

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of $\displaystyle 37$° with each other. When suspended in a liquid of density $\displaystyle 0.7 \mathrm{~g} / \mathrm{cm}^3$, the angle remains same. If density of material of the sphere is $\displaystyle 1.4 \mathrm{~g} / \mathrm{cm}^3$, the dielectric constant of the liquid is $\displaystyle \_\_\_\_$ $\displaystyle \left(\tan 37^{\circ}=\frac{3}{4}\right)$