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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Charge and Coulombs Law

  • question_answer
    Two charges placed in air repel each other by a force of \[{{10}^{-4}}N\]. When oil is introduced between the charges, the force becomes \[2.5\times {{10}^{-5}}N\]. The dielectric constant of oil is                                                               [MP PET 2003]

    A)            2.5 

    B)            0.25

    C)            2.0 

    D)            4.0

    Correct Answer: D

    Solution :

                 By using \[K=\frac{{{F}_{a}}}{{{F}_{m}}}\Rightarrow K=\frac{{{10}^{-4}}}{2.5\times {{10}^{-5}}}=4\]


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