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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    A parallel plate condenser is connected with the terminals of a battery. The distance between the plates is\[6mm\]. If a glass plate (dielectric constant\[K=9\]) of \[4.5mm\] is introduced between them, then the capacity will become

    A)                    2 times

    B)                                      The same

    C)                    3 times                            

    D)            4 times

    Correct Answer: C

    Solution :

               \[C\propto \frac{1}{d}\]Þ \[\frac{{{C}_{medium}}}{{{C}_{air}}}=\frac{d}{d-t+\frac{t}{K}}=\frac{6}{6-4.5+\frac{4.5}{9}}=\frac{6}{2}=3\]


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