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NEET Sample Paper NEET Sample Test Paper-42

  • question_answer
    A potentiometer having the potential gradient of 2mV/cm is used to measure the difference of potential across a resistance of\[10\phi \]. If a length of 50cm of the potentiometer wire is required to get the null points, the current passing through \[10\phi \] resistor is: (in mA)

    A) 1                                 

    B) 2    

    C) 5                                 

    D) 10

    Correct Answer: D

    Solution :

    Potential gradient \[\overset{{}^\circ }{\mathop{V}}\,=\frac{V}{\ell }=2mv/cm\]


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