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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 39

  • question_answer
    Two parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference\[{{V}_{0}}\]. The battery is then disconnected and the region between the plates of the capacitor C completely filled with a material of dielectric constant 2. The potential difference across the capacitors now becomes -

    A) \[\frac{{{V}_{0}}}{4}\]            

    B)        \[\frac{{{V}_{0}}}{2}\]

    C) \[\frac{3{{V}_{0}}}{4}\]                      

    D)        \[{{V}_{0}}\]

    Correct Answer: C

    Solution :

    [c] \[{{V}_{com}}=\frac{{{q}_{1}}+{{q}_{2}}}{{{C}_{1}}+{{C}_{2}}}\]


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