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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    The electric potential V is gives as a function of distance X (metre) as \[X=(5{{x}^{2}}+10X-9)V\]. The magnitude of electric field at \[X=1\] is:

    A)  \[220V/W\]          

    B)  \[6V/W\]

    C)  \[11V/m\]                   

    D)  \[-23V/m\]

    Correct Answer: A

    Solution :

    As,          \[E=\left| \frac{dV}{dX} \right|=1\,(10X+10)|\,X=1\] After differentiating and putting \[X=1,\]we get                         \[E=20V/m.\]  


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