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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Capacitance

  • question_answer
    If a dielectric substance is introduced between the plates of a charged air-gap capacitor. The energy of the capacitor will [MP PMT 2004]

    A)            Increase

    B)            Decrease

    C)            Remain unchanged

    D)            First decrease and then increase

    Correct Answer: B

    Solution :

               \[U=\frac{{{Q}^{2}}}{2C};\] in given case C increases so U will decrease.


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