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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    If we  impurity to a metal, those atoms also deflect electrons. Therefore,

    A)  the electrical and thermal conductivity both increases

    B)  the electrical and thermal conductivity both decreases  

    C)  electrical conductivity increase but thermal conductivity decreases

    D)  thermal conductivity increases but electrical conductivity decreases

    Correct Answer: B

    Solution :

     By addition of impurity, resistivity increases, so conductivity decreases. So, the correct option is [b].


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