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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    There is an air filled \[1pF\] parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to\[2pF\]. The dielectric constant of wax is           [MNR 1998; KCET 2005]

    A)                    2

    B)                                      4

    C)                    6                                        

    D)            8

    Correct Answer: B

    Solution :

               \[C=\frac{{{\varepsilon }_{0}}A}{d}=1pF\] and \[C'=\frac{K{{\varepsilon }_{0}}A}{2d}=2pF\] \ K = 4.


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