NEET Sample Paper NEET Sample Test Paper-16

  • question_answer 18) Two condensers of capacity C and 2C are connected in parallel and are charged to a potential difference V. If now the battery is removed and a material of dielectric constant K is placed between the plates of condenser of capacity C, then the potential difference across the condensers will be

    A) \[\frac{3V}{K+2}\]                

    B) \[3V(K+2)\]    

    C)      \[\frac{K+2}{3V}\]    

    D)      \[\frac{3(K+2)}{V}\] 

    Correct Answer: A

    Solution :

    The total quantity of charge on the system remains constant after disconnecting the battery \[q=3CV=(KC+2C)V'\] \[\therefore \]    \[V'=\frac{3V}{K+2}\] Hence, the correction option is (a).

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