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JEE Main & Advanced Physics Electrostatics & Capacitance JEE PYQ-Electrostatics and Capacitance

  • question_answer
    Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of\[30{}^\circ \]with each other. When suspended in a liquid of density\[0.8\text{ }g\text{ }c{{m}^{3}},\] the angle remains the same. If density of the material of the sphere is\[1.6\text{ }g\text{ }c{{m}^{3}},\] the dielectric constant of the liquid is -                            [AIEEE 2010]

    A) 1

    B) 4

    C) 3

    D) 2

    Correct Answer: D

    Solution :

    [d] \[\frac{1}{1-\frac{\rho }{\sigma }}-=\frac{1}{1-\frac{.8}{1.6}}=2\]


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