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MGIMS WARDHA MGIMS WARDHA Solved Paper-2005

  • question_answer
    A current of 2 ampere flowing through a conductor produces 80 joule of heat in ten seconds. The resistance of the conductor is :

    A) 0.5\[\Omega \]                                

    B) 2\[\Omega \]

    C) 4\[\Omega \]                                    

    D) 20\[\Omega \]

    Correct Answer: B

    Solution :

    \[I=2\text{ }A,\text{ }H=80\]Joule,\[t=10\text{ }\sec \] \[\therefore \] Heat produced \[H={{I}^{2}}Rt\]                                 \[80={{(2)}^{2}}\times R\times 10\]                                 \[80=4\times R\times 10\]                                 \[R=2\,\Omega \]


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