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AIIMS AIIMS Solved Paper-2010

  • question_answer
    When a copper voltmeter is connected with a battery of emf 12 V. 2 g of copper is deposited in 30 min. If the same voltmeter is connected across a 6 V battery then the mass of copper deposited in 45 min would be

    A)  1g                                         

    B)  1.5g                      

    C)        2 g                        

    D)        2.5 g

    Correct Answer: B

    Solution :

    Mass, \[2\sqrt{2}s\] \[2s\] \[\frac{1}{2}s\] or             \[\frac{g}{4}\] \[Mg\frac{d}{4}\]     \[3Mg\frac{d}{4}\] Here, \[-3Mg\frac{d}{4}\] \[l\]   V and \[2l\]min \[\frac{l}{2}\] \[4l\]       \[{{C}_{1}}=C,\,{{C}_{2}}=2C\,,\,{{C}_{3}}=3C\] The mass of copper deposited = 1.5 g


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