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VIT Engineering VIT Engineering Solved Paper-2011

  • question_answer
     A 2 V battery, a \[15\Omega \] resistor and a potentiometer of 100 cm length, all are connected in series. If the resistance of potentiometer wire is \[5\Omega \], then the potential gradient of the potentiometer wire is

    A)  0.0005 V/cm

    B)  0.05 V/cm

    C)  0.02V/cm

    D)  0.2 V/cm

    Correct Answer: A

    Solution :

    Potential gradient \[=\frac{e}{(R+{{R}_{h}}+r)}.\frac{R}{L}\] \[=\frac{2}{(15+5+0)}\times \frac{5}{1}\] \[=0.5V/m\] \[=0.005V/cm\]


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