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BHU PMT BHU PMT (Screening) Solved Paper-2008

  • question_answer
    ECE of copper is\[3.3\times {{10}^{-7}}kg/C\]. If 100 kWh energy is consumed at 33 V in a copper voltameter, then mass of copper liberated is

    A)  3.6kg                                   

    B)  3.3kg

    C)  1kg                                       

    D)  \[1\,mg\]

    Correct Answer: A

    Solution :

                     Mass of copper liberated \[m=zit\]                 \[=z\left( \frac{P}{V} \right)t\]                 \[=(3.3\times {{10}^{-7}})\left( \frac{100\times 36\times {{10}^{5}}}{33} \right)\]                 \[=3.6\,kg\]


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