1.

The electric potential \[V\] is given as a function of distance \[x\] (metre) by \[V=(5{{x}^{2}}+10x-9)\,volt\]. Value of electric field at \[x=1\] is                                         [MP PET 1999]

A.                    \[20\,V/m\]
B.                                      \[6\,V/m\]
C.                    \[11\,V/m\]
D.                                      \[-23\,V/m\]
Answer» B.                                      \[6\,V/m\]


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